Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...

 
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
Shape your
     water future.
Draft water resources
management plan 2019
        Overview
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
Introduction                                                                                                                                                Your current water supply
                                                                                                                                                                We take water from rivers and under the ground, treat it and distribute
    W       ater is essential for everything we do - from having a drink, to
            washing our clothes, and flushing the loo. It’s also essential
    for a healthy environment and a prosperous economy. It’s our job to
                                                                               to 2100. We have to comply with legal requirements and have
                                                                               followed the government’s guidelines in preparing our water plan.                it to homes and businesses across our supply area through a network of
    provide a reliable supply of safe drinking water to around 10 million      We want to hear what you think, and are running a public
                                                                                                                                                                underground pipes. Every day we supply our customers with more than 2,600
    household customers and 215,000 businesses in London and across            consultation on our water plan, starting in February 2018 and closing            million litres of water - enough to fill 1,000 Olympic sized swimming pools.
    the Thames Valley.                                                         on 29 April 2018. Your feedback will help us decide how to meet our
                                                                               customers’ needs in the future.
    Many people think there is plenty of water in the UK, but the South
    East of England is one of its driest regions and London gets less rain     We’re also developing our draft Business Plan, which focuses on the                                                                                                                                           To boost water supplies,
    than Rome, Dallas and even Sydney. Our water supplies are being            first five years (2020 to 2025) of the period covered in our water                                                                                                                                              we built a desalination
                                                                                                                                                                                                                                                        Water is stored in                    plant in 2010. This takes
    stretched further and further as the number of people living in our        plan, and sets out what we are going to do for both our water and                    In the Thames Valley,                                                            reservoirs to use when
                                                                                                                                                                     around 70 % of our                 In London, about 80%                                                                  water from the Thames
    area increases. We have to plan ahead, because the choices we              wastewater services. We’re also seeking your views on this plan.                                                          of our water is taken                      the flow in rivers is low,               estuary, removes the salt,
                                                                                                                                                                     water is taken from                                                             or of poor quality. Our
    make today will shape the water supply we can provide in the future.                                                                                           underground sources in               from the River Thames                                                                  and treats the water. It
                                                                                                                                                                                                           and the River Lee.                      reservoirs hold about 100                  is an important reserve
                                                                                                                                                                   the Cotswolds and the                                                              days supply of water.
                                                                                      Throughout this document you will see this symbol,                                                                                                                                                     but is a last resort as it is
    This document is an overview of our draft Water Resources                                                                                                            Chiltern Hills.
                                                                                      which highlights the questions we would like your
                                                                                                                                                                                                                                                                                              expensive and uses lots
    Management Plan 2019, referred to in this document as our ‘water                                                                                                                                                                                                                                  of energy.
                                                                                      response on as part of this consultation. You can find                                River

    plan’. It sets out how we plan to provide a secure and sustainable                out more about the consultation on page 23.                       River
                                                                                                                                                       Severn
                                                                                                                                                                            Avon

    supply of water for our customers over the next 80 years from 2020

                                                                                                                                                                                      Banbury                                                                                                                       Essex

       Contents                                                                                                                                                    Cotswolds
                                                                                                                                                                                                        Oxford        Chiltern Hills                  we export to
                                                                                                                                                                                                                                                     Affinity Water
                                                                                                                                                                                                                                                                              River Lee

                                                                                                                                                                                                                                                                      North London
                                                                                                                                                                                                                                                                       groundwater
                                                                                                                                                                                                                                                                            storage
                                                                                                                                                                                                                                                                                                                     we export to
                                                                                                                                                                                                                                                                                                                     Essex & Suffolk Water

       3                                                                          16
               		        Your current water supply                                                Deciding on our preferred 		                                                      Swindon
               		        A closer look at your current water supply area                          programme                                                                           Farmoor
                                                                                                                                                                                                                        Gatehampton
                                                                                                                                                                                                                                                                                             Lee Valley
                                                                                                                                                                                                                                                                                             Reservoirs
                                                                                                                                                                                                                                                                                                              Beckton
                                                                                                                                                                                      Reservoir
                                                                                                  A description of how we have made                                                                                                                                                                           Desalination
                                                                                                                                                                                                                                                            London
                                                                                  		              our decisions

       4
                		       Looking ahead                                                                                                                                                                                                   Lower
                                                                                                                                                                                                                                        Thames
                		       The future challenges                                                                                                                                                                                        Reservoirs

                                                                                 20
                                                                                                                                                                                                                                                                                      Ring
                                                                                                                                                                                                                                                                                      Main     SE London
                                                                                                                                                                                                                                                                                               Groundwater
                                                                                                  Our proposed plan                                                                                                            Surrey
                                                                                                  Our proposals to provide a reliable

       8
                                                                                                                                                                                                                                                                                                                               Kent
                         What our customers want                                                  water supply
                                                                                                                                                                                                                                       River Wey

                                                                                                                                                                                                                                                        Guildford
                         An overview of your priorities and preferences                                                                                                                     Hampshire                                 Guildford
                                                                                                                                                                                                                                   Groundwater

                                                                                 23
                                                                                                  Shape your water future

       10
                         Options available to help                                                Details of how to participate in the
                         manage future water supply                                               public consultation
                         An outline of the options we have considered

                                                                                                                                                                Key facts
                                                                                                                                                                • Our area and the wider South East are classified by the 		                  • About 38 per cent of our household customers have a water meter.

                 This document is an overview of our water plan.                                                                                                  Environment Agency as “seriously water stressed”.
                                                                                                                                                                                                                                              • On average each of our customers uses 146 litres of water every day.
                 This symbol signposts the relevant sections of                                                                                                 • The Thames river catchment is the most intensively used water
                                                                                                                                                                  resource system in England. Around 90 per cent of water that                • Around 25 per cent of the water we put into supply is lost through
                 the more detailed report if you want to read                                                                                                     is abstracted is for public water supply. The remaining 10 per                leaks from our water supply pipes and our customers’ pipes.
                 more. The report is available on our website                                                                                                     cent is for energy generation, agriculture and other uses. The
                 thameswater.co.uk/yourwaterfuture                                                                                                                Environment Agency regulates these abstractions.

                                                                                                                                                                           Section 1: Introduction and background
                                                                                                                                                                           Section 2: Water resources programme 2015-2020
2                                                                                                                                                                                                                                                                                                                                    3
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
Looking ahead
                                                                                                                                           Environment - Wildlife in wetlands and rivers relies on a healthy environment with
                                                                                                                                           plentiful water. We need to balance the water we take for our customers with what
    Our water supplies are already under pressure, and this will increase in the future.                                                   we leave in the environment. We will continue to reduce the amount of water we take
                                                                                                                                           from rivers in parts of our region where the environment is under pressure.
    The number of people living in our area is growing rapidly and they will all need
    water.

                    Population growth - London and the Thames Valley is already one of the most densely                            Section 4: Current and future water supply
                    populated parts of the country, and the number of people living and working here
                    is forecast to grow significantly. By 2045 we forecast that there will be around two
                    million more people living in our area. That’s the equivalent of Birmingham and
                    Glasgow moving in. And by 2100 we forecast that there could be more than 15 million
                    people living in our area.
                                                                                                                  Taking all these factors into account, we predict there will be a shortfall
                                                                                                                  between the amount of water available and the amount we need –
                                                                                                                  unless we take action.
       Forecast population growth:
       Thames Water supply area

                                                                                             2100                 T   his shortfall will start in the next five years and is forecast to grow
                                                                                                                      to around 360 million litres of water per day by 2045. That’s
                                                                                                                  equivalent to the amount needed by over two million people. The
                                                                                                                                                                                                                     One mega litre
                                                                                                                                                                                                                   equals one million
                                                                                                                                                                                                                 litres of water and is
                                                                                                                  shortfall is forecast to increase to 864 million litres of water per day                      equivalent to the water
                                                                                                                  by 2100, the end of our planning period.                                                       used by about 7,000
                                                                      2080                                                                                                                                          people each day.
                                                                                                                  The challenge is most severe in London, but we also forecast a
                                                                                                                  significant shortfall in the Swindon and Oxfordshire region, and other
                                                 2045                                                             parts of the Thames Valley.
                                                                                            15.4m
                                                                                              people
                             2030                                                                                 Supply demand shortfall:
                                                                                                                                                                                                     2100
         2019                                                                                                     Thames Water supply area
                                                                     15.3m
                                                                       people
                                                                                                                                                                                                               DEMAND = Amount of water we need
                                                                                                                                                                                           2080
                                                12.0m
                                                  people

                            11.0m
        10.2m                 people                                                                                                                                 2045                                       By 2100 we forecast
          people                                                                   We have used data from the                                                                                        15.4m      that there will
                                                                                     Mayor of London and local                                                                                        people

                                                                                     authorities to develop our                                2030                                                             be a shortfall of:

                                                                                                                                                                                                                864million
                                                                                                                         2019
                                                                                forecasts of population growth.                                                                           15.3m
                                                                                                                                                                                            people

                                                                                                                                              11.0m
                                                                                                                                                                    12.0m
                                                                                                                                                                      people
                                                                                                                                                                                                                litres
             Section 3: Current and future demand for water                                                             10.2m
                                                                                                                          people
                                                                                                                                                people                                                          per day

                                                                                                                                                                                                               e.g          x11million
                                                                                                                                                                                                                      or
    At the same time, the amount of water that we can take from rivers and
    underground sources is reducing, due to changes in the climate and the need to                                                                                                                                   x6million
                                                                                                                                                                                                               without water for a day
    protect the environment.

                    Climate change - Our climate is changing. Hotter, drier summers in the future will
                    mean that there will be less rain when we need it most, and extreme weather events
                    are likely to be more common.
                                                                                                                                                                                                               SUPPLY = Amount of water available

                                                                                                                                   Section 6: Baseline supply demand position

4                                                                                                                                                                                                                                                   5
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
There are also other factors                                                                            The pressures
                                                                                                              on water supplies
         which affect our water plan.                                                                      are expected to become
                                                                                                           very serious in the future
                                                                                                          and we need to act now to
                                                                                                           make sure there is a safe
           The UK is often thought of as rainy, but we do have dry spells and droughts when the
           amount of water in the ground and rivers is low. In severe droughts we might need to put         and reliable supply of
           in place water restrictions. This would mean that water for everyday activities would be         drinking water for our
           rationed and your water might be turned off for periods during the day. These restrictions
           could last for several weeks. As well as disrupting our customers’ lives, restrictions would           customers.
           also have a damaging effect on the natural environment, and could cost London’s economy
           alone up to £330 million every day. We know that there have been severe droughts in the
           past and these are likely to happen more often in the future. We need to plan ahead to
           protect our customers and the environment from their effects. Our customers have told
           us that they would like us to plan to provide a more reliable water supply to cope with the
           effects of a severe drought. This is also supported by the government.

                        Our proposed plan is designed to maintain all of our
                        customers’ water supply, with no need for it to be
                        rationed, during a severe drought (the kind that might
                        happen once in every 200 years).
                        We have some options about how quickly we achieve this:
                        - Ensure that we can maintain all of our customers’ water
                          supply during a severe drought, by 2030
                        - Delay the work so we can maintain all of our customers’
                          water supply by 2035.
                        - Speed up the work so we can maintain all of our customers’
                          water supply by 2027, the earliest we can deliver suitable
                          options.
                        Please give us any comments on this.

           A regional perspective - The pressures of population growth and climate change are
           affecting the whole of the South East of England – not just our area. In our water plan
           we have aimed to meet the growing water needs of the wider South East of England,
           taking into account opportunities to transfer water from across the region and beyond.
           By working together with other water companies across England and Wales we’re taking
           a coordinated approach to planning for the future and making sure all our plans offer
           customers the best possible value for money. Some of our neighbouring companies have
           asked us to provide water to them in the future, which their customers would pay for, and
           we have included their needs in our water plan.

    Section 4: Current and future water supply

6                                                                                                                                       7
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
What our customers want
    We have worked closely with our customers to understand their views
    and preferences. We have asked them what we should consider in
    developing our water plan; whether and how often they are prepared
    to accept restrictions – like hosepipe bans – during a drought and
    where they think we should get the water from. We have listened to
    their feedback and used this information to develop our water plan.
    Here’s a summary of what our customers have told us.

                      We’ve engaged with over     Customers think that the current
                      18,000
                      customers in developing
                                                  levels of leakage are too high and
                                                  would like us to do more to fix leaks.
                      our future plans through
                      research, day-to-day        Over 70% of customers said they
                      interactions and local
                      community events.           want help to reduce their water use.

     Most customers                               Alongside leakage
                                                  reduction and helping
     are unaware of the                           our customers use water
     challenges for future                        efficiently, customers also                             In 2016 we
     water supply.                                support the development                            visited over 60,000
                                                  of new water resources.                            homes and installed
                                                                                                     more than 200,000
                                                  Communities
                  Once they understand the        that would be                                      water saving devices
                  challenges, they want to        affected by future                                helping our customers
                  know that we are planning       development                                           save water and
                  for the future.                 would like to be
                                                  engaged on plans.                                         money.

                                                  The bill is important in
                Most customers do not want        deciding future plans, but
                more frequent restrictions on                                                    As well as listening to our customers, we have also listened to our regulators,
                their water use.                  it is not the only factor.
                Over 60% told us that this        Customers support ‘best                        who are responsible for making sure customers get good value for money,
                would affect their daily lives.   value’ planning.                  Best Value   and protecting the environment. We have also spoken to lots of other interest
                                                                                                 groups. These include environment groups like RSPB and WWF, organisations
                                                                                                 representing businesses, such as the Chambers of Commerce, and many more.
                                                                                                 We have done this to make sure we understand their different interests, and have
                                                                                                 used their feedback to help prepare our water plan.
              Please give us your comments on our summary of our customers’
              views.

         Appendix T: Customers priorities and preferences                                              Appendix S: Stakeholder engagement

8                                                                                                                                                                                   9
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
Options available to help man age future water supply
     We looked at more than 200 options to help to fill the shortfall between the
     amount of water available and the amount we need. These include ways to                                                                    Please give us your comments on the options we have considered.
     make the most of the water supplies that we already have available, called
     demand management options, and new sources of water, called water
     supply options.
                                                                                                                                           Section 7: Appraisal of Resource Options
                              Demand management options – Our first priority is to make sure that we make the best use of                  Section 8: Appraisal of Demand Management Options
                              the water we already have. We’ll do this by:
                              ·   Continuing our work to reduce the amount of water lost through leaks from our pipes. This
                                  year we did not meet our target to reduce leaks for the first time in 11 years but we have a
                                  detailed plan to reduce leakage to 646* million litres a day by 2020. We are investing in new
                                  technology to help find more leaks and employing additional people to repair them. In our
                                  water plan we have considered a number of options to continue to reduce leakage, and have
                                  set out how much more we can reduce leakage by, and how quickly we can do it.
                              ·   Installing meters in our customers’ homes. Smart meters help us to understand where water
                                  goes, helping us to tackle leakage, they also help our customers understand how much water
                                  they use and how they can reduce it, saving both money and water. Since 2015 we have
                                  installed more than 145,000 smart meters in our customers’ homes and around 38 per cent
                                  of our household customers are metered. In our water plan we have considered how we will
                                  continue to roll out this programme.
                              ·   Helping our customers use water efficiently. We are currently delivering the UK’s largest ever
                                  water efficiency programme. This includes a wide number of activities and promotes the
                                  benefits of saving water at home and in the workplace. This year we visited more than 60,000
                                  of our customers’ homes, provided specific advice, and installed more than 200,000 free
                                  water saving products. In our water plan we have considered how we can continue to develop
                                  our programme, looking at new and innovative approaches to help our customers to reduce
                                  their water use.

                               Water supply options – We have looked at a large number of options to boost our water
                               supplies, from traditional techniques to more innovative and unusual approaches. They include
                               turning seawater into drinking water (desalination), reusing treated wastewater from sewage
                               treatment works, and building a large storage reservoir. We have also talked to other water
                               companies to see if they have spare water that we could buy, including moving water from
                               North West England, and Wales, to the South East of England. Some of the water supply
                               options we have considered are shown on the map on the next page.

     We have assessed the options in terms of:

       • cost                                                                   • effects on the environment and
                                                                                  society
       • time to make the water available
                                                                                • confidence that it will work as
       • ability to cope with a changing                                          expected
         future

     This assessment produced a preferred set of options.
     * We are working to reduce our leakage to 606 million litres per day by 2020. However, the way water companies calculate leakage is
     changing. This resets our starting position to 646 million litres per day from 2020.

10                                                                                                                                                                                                                11
Draft water resources management plan 2019 - Shape your water future. Overview - Corporate | Thames ...
Some of the water supply options we have considered

                                                    Groundwater abstraction        River abstraction               Water reuse      Aquifer
             Water transfer                         at Ashton Keynes,              above Teddington                at Beckton &     storage &
             from River Severn                      Moulsford & Datchet.           Weir                            Deephams         recovery

                                                                                                                                                  Jargon buster
                                                                                                                                                  Water transfer – water is moved from one area to
                                                                                                                                                  another via a pipeline, canals or rivers.
                                                                                                                                                  Reservoir – water is stored in reservoirs and
                                                                                                                                                  used when there isn’t enough water in the
                                                     Birmingham                         ENGLAND
                                  River                                                                                                           environment.
                                 Severn
                                                                                                                                                  Groundwater abstraction – water is taken from
                                                        River
                                                        Avon                                                                                      natural underground reservoirs.

                                                                   Warwick                                                                        River abstraction – water is taken from rivers.
                                                                                                                                                  Water reuse – treated effluent from sewage
                                                                                                                                                  treatment works undergoes further treatment, is
                                                                                                                                                  returned to the river, re-abstracted and treated to
                                                                                                                                                  produce drinking water.
     WALES                                                                                                                                        Aquifer recharge/storage & recovery – treated
                                                                                                                                                  water is added to a natural underground reservoir
                                                                                                                                                  and is available for abstraction when it is needed.
                                                                                                                                                  Desalination - salt is removed from estuarine or
                                                                                                                 London                           sea water to produce drinking water.

                                                                                                 River
                                                                                                Thames

                                          New reservoir storage   Water transfer       Aquifer recharge   Groundwater        New desalination
                                          at Abingdon             via Oxford           at Merton &        at Addington       plant at Crossness
                                                                  canal                Streatham          & Southfleet       & Beckton

12                                                                                                                                                                                                      13
We can’t be
             certain of how
             the future will
     be, but it is clear that
     there is a growing water
     shortfall. We need to
     plan ahead to provide
     a secure water
     supply.

14                              15
Deciding on our preferred programme
                                                                                                                                                 Four best programmes
                                                                                                                                                 In the first 15 years of the water plan, from 2020 to 2035, all the                This is combined with small schemes to take more water from
                                                                                                                                                 programmes concentrate on making the best use of the water                         underground sources and buy water from other organisations who
                                                                                                                                                 that is already available by reducing leakage, installing more water               have spare licensed capacity. We also plan to develop a new large
                                                                                                                                                 meters, and providing more help for people to use water efficiently.               supply scheme to take more water from the River Thames above
                                                                                                                                                                                                                                    Teddington Weir in west London.

     W      e have used computer models and decision support tools
            to help develop programmes of options, assess them, and
     decide on our preferred programme. A programme is made up of a
                                                                           To start with we developed the lowest cost programme. However, our
                                                                           customers told us they wanted us to consider a range of factors in
                                                                           planning future water supply. This was also widely supported by the
                                                                                                                                                  All programmes include:
                                                                                                                                                                                                                                                                       River abstraction above
                                                                                                                                                                                                                                                                          Teddington Weir
                                                                                                                                                      2020
                                                                                                                                                                                                                                            New                Buy
     number of options and sets out when each option is needed, and        government and stakeholders. We therefore considered a number of
                                                                                                                                                                                                         Water                          groundwater           water
     how much water it can provide.                                        additional factors to ensure our water plan provides the best value                                             Leakage     efficiency        Metering
                                                                           for money for our customers over the long term.                                                                reduction
                                                                                                                                                      2030

        Factors considered in deciding on our preferred programme                                                                                From 2035 onwards, all the alternative programmes include the development of new large water supply schemes.
                                                                                                                                                 They all include a new reservoir, in combination with other supply schemes.
                    Cost – both building and operating costs
                                                                                                                                                                                                           Least                             Most able to
                                                                                                                                                                     Lowest cost                       environmental                       cope with future              Most sustainable
                    Customers’ preferences – which options our customers prefer, and how they feel                                                                                                         effect                             challenges
                    about the risk of drought                                                                                                                                                                                                    Oxford
                                                                                                                                                                                                                    Desalination                 canal transfer
                                                                                                                                                      2030
                                                                                                                                                                                                                    Beckton
                    Impact on the environment – both positive, such as recreational opportunities,
                    and negative, such as loss of land                                                                                                                                                              River Severn
                                                                                                                                                                                                                    transfer
                                                                                                                                                      2040                                                                                          Desalination
                    Deliverability – confidence that the programme will provide the water it is                                                                               Water reuse                           Reservoir                       Beckton
                    expected to                                                                                                                                               Deephams
                                                                                                                                                                                                                                                    Water reuse
                                                                                                                                                                                                                                                    Deephams                      Reservoir

                    Resilience - ability to cope with a range of challenges, such as droughts                                                         2050                    Reservoir
                                                                                                                                                                                                                                                    Reservoir

                    Inter generational fairness – how the costs are shared between customers now                                                                                                                                                    River Severn
                                                                                                                                                                              Oxford                                                                transfer                      Oxford
                    and in the future                                                                                                                 2060                    canal transfer                                                                                      canal transfer

                                                                                                                                                                                                                                                    Water
                                                                                                                                                                                                                                                    reuse
        We also looked at how flexible the programme is to possible future                                                                                                    Water                                                                 Beckton                       Water
        changes. We call this adaptability.                                                                                                           2070
                                                                                                                                                                              reuse                                                                                               reuse
                                                                                                                                                                              Beckton                                                                                             Beckton

     We developed a number of
     alternative programmes which:
                                                                                                                                                      2100

     • met the water shortfall we forecast                                 We worked with industry experts to review the alternative
                                                                                                                                                        The size of the circle indicates how much water each of the options can provide.
                                                                           programmes. The experts challenged us to make sure our approach
     • improved our ability to cope with a severe drought                  was fair and balanced. From this work we have focused on the four
                                                                           best programmes.                                                         We analysed the four programmes and concluded that the                         To support this work we completed detailed assessments of how
     • looked beyond our supply area, considering the needs of the wider                                                                            most sustainable programme is the best one for our area. This is               the different programmes would affect the environment, including
       south east region.                                                                                                                           because it:                                                                    a Strategic Environmental Assessment (SEA). These considered the
                                                                                                                                                    • reflects the preferences of our customers;                                   environmental and social effects of options, preferred programmes
                                                                           The diagram opposite shows the four best
     We assessed the pros and cons of each of the alternative                                                                                       • is flexible enough to deal with a range of risks;                            for each water resource zone, and the preferred plan as a whole.
                                                                           programmes:
     programmes, and tested them to see how they would cope                                                                                         • is among the lowest cost programmes; and
                                                                           • lowest cost
     with different possible futures. This helped us understand, for                                                                                • fairly shares the costs between customers now and future
     example, which programmes would be able to cope with more             • least environmental effect                                               generations.
     severe droughts, and which programmes would be best for the           • most able to cope with future challenges
     environment.                                                          • most sustainable - this programme shares costs with future                      Section 9: Environmental appraisal
                                                                             generations in the fairest way                                                  Appendix B: Strategic Environmental Assessment
                                                                                                                                                             Appendix C: Habitats Directive Assessment
16                                                                                                                                                           Appendix BB: Water Framework Directive Assessment                                                                                          17
But what if the future is different?
     One thing we can be certain of is that we can’t predict exactly how   we can’t delay making decisions. It is clear there is going to be a
     the future will be. There are lots of uncertainties, including how    growing water shortfall, so we need to plan and act now. We have
     quickly the number of people living in our area will grow, changes    tested our preferred programme and are confident it can cope with
     to the amount of water we can take from the environment, the          a wide range of possible futures. We will review our plan every five
     weather patterns we will see, and the the timing and amount of        years and will make adjustments to take into account changes to our
     water that neighbouring water companies may need from us. But         projections.

     There are lots of
      uncertanties in
                                                                WRMP19                                                       WRMP24
       developing
     long term plans
                                                          Every 5 years we                                                And if not,
                                                         review our plan to                                              make changes
                                                         see if it is still the
                                                           right approach

     WRMP19 - Water Resources Management Plan 2019

                Section 10: Programme appraisal and scenario testing

                        Please give us your comments regarding the approach we have taken
                        to develop our proposed water plan.

                        Do you have any specific comments on:
                        1. How we have reflected the priorities of our customers
                        2. The way we have shortlisted options
                        3. How we have considered environmental and social impacts
                        4. The alternative programmes of options we have considered

18                                                                                                                                                19
Our proposed plan                                                                                                                                                                             Water efficiency
                                                                                                                                                                                              • Our customers have told us that they would like help to reduce their water use. We are
                                                                                                                                                                                                already running an industry-leading programme to promote the efficient use of water to
                                                                                                                                                                                                our customers and we plan to do more.
                                                                                                                                                                                              • We will provide information, support and tailored advice through our Smarter Home

     U   nless we act now, there will be a significant shortfall between            efficiently as possible, and reduce waste. We have set ambitious                                            Visit programme, which includes a free water audit and installation of free water
         supply and demand, and it will not be possible to provide a safe           targets to reduce leakage from our water pipes and our customers’                                           saving technology, helping our customers use less water. We are also developing new
     and reliable water supply to our customers.                                    own private pipes, install more smart water meters and give our                                             approaches, such as an incentive-based reward scheme to encourage changes in water
                                                                                                                                                                                                use and opportunities to use water treated to a lower standard to flush the loo. We will
                                                                                    customers practical help and advice to reduce the water they use.
                                                                                                                                                                                                also continue to work with local authorities, housing associations, schools and businesses
     Our top priority is to make the best use of the water we have                  Our proposals are summarised below.
                                                                                                                                                                                                to promote the efficient use of water.
     available. We understand how important it is to our customers and
     other stakeholders that we use the water resources that we have as                                                                                                                       • In the next five years, by 2025, we will visit nearly 300,000 customers’ homes and
                                                                                                                                                                                                businesses to promote water efficiency. The programme is estimated to save 24 million
                                                                                                                                                                                                litres of water every day.

                                Leakage
                             • We manage more than 31,000 km of water pipes. The pipes in many areas of London,                                                                          But actions to manage demand for water won’t be enough on their own, and we will
                               and some parts of the Thames Valley, are amongst the oldest in the UK. Leaks are                                                                          also need to develop new sources of water. There is no single new water supply option
                               inevitable on a network of this size and age. In 2020, of the 2,600 million litres of water                                                               which can solve the shortfall so our proposed approach includes a combination of
                               that we put into the network every day, we will lose around 646 million litres through                                                                    options.
                               leaks – that’s about 25 per cent.
                             • Reducing leaks is our highest priority. This reflects the views of our customers, who
                               expect an ambitious step-change in the amount of water that we lose through leakage.                                                                           New water supplies
                               Customers told us that they would like us to reduce leakage to around 15 per cent of the                                                                       In the next five years, by 2025, we plan to:
                               water that we put into supply, though they recognise that traffic disruption and cost may
                               limit what is possible in the short term.                                                                                                                      • develop new groundwater sources in London which will provide around 12 million litres
                                                                                                                                                                                                of water per day.
                             • Our ambition is to reduce leakage by a minimum of 15 per cent by 2025*. This means
                               we’ll reduce the amount of water lost from 646 to 549 million litres every day, or from 25                                                                     • buy water from other organisations who have spare licensed water which will provide
                               to 22 per cent of the amount of water that we put into supply. We will do this through a                                                                         around 17 million litres of water per day.
                               major programme to replace and repair our water pipes. In the future we want to reduce                                                                         • make preparations for a new scheme to take more water from the River Thames above
                               leakage further, and are working hard to understand how much more we can achieve, by                                                                             Teddington Weir in west London, which will provide around 270 million litres of water
                               when and at what cost. We will include this in our revised plan.                                                                                                 per day from 2030. An outline of the scheme is shown in the diagram below.

                                Metering                                                                                                                           Direct river abstraction at Teddington
                             • Smart meters provide customers with information that helps them take control of their                                                                                                                                                                   London
                               bills and reduce their water use. On average, households who have a smart meter reduce
                                                                                                                                                                                   1
                               their water use by between 15-20%. Meters also provide us with vital information to help
                               manage our water supply network, including pinpointing leaks.                                                                           Mogden Sewage
                                                                                                                                                                       Treatment Works (STW)
                                                                                                                                                                       The wastewater, collected
                             • In the next five years, by 2025, we will install a further 400,000 smart meters in                                                      from houses and businesses,
                                                                                                                                                                                                                Some of the treated
                                                                                                                                                                                                                                          2
                                                                                                                                                                       is treated at the STW so that
                               customers’ homes saving 49 million litres of water.                                                                                     it can be put back safely into           wastewater effluent is
                                                                                                                                                                                                                pumped, via underground                   Richmond
                                                                                                                                                                       the River Thames
                                                                                                                                                                                                                tunnel, upstream to Teddington

                                                                                                                                                                                                           Twickenham

                                                                                                                                                                                                                                                                                                 Existing underground
                                                                                                                                                                                                                                                                                                 pipe to transfer water
                                                                                                                                                                                                                                                                                                 to the reservoirs in
                                                                                                                                                                                                                                                 River                                           the Lee Valley
                                                                                                                                                                                                                                                 Thames
                                                                                                                                                                                                                          Teddington
                                                                                                                                                                                                                          Weir

                                                                                                                                                                                                            3
                                                                                                                                                                                                  The treated effluent is                                   4
                                                                                                                                                                                                  put into the River Thames                                                                              Direction of flow of
                                                                                                                                                                                                  above Teddington Weir to                                                                               the River Thames
                                                                                                                                                                                                  make sure there is enough water                               New abstraction from the
                                                                                                                                                                                                  in the river for environmental                                River Thames. This water
                                                                                                                                                                              Teddington          and navigational purposes.                                                                             Treated effluent
                                                                                                                                                                                                                                                                is transferred via an existing
                                                                                                                                                                                                  This is required to allow                                     underground tunnel to supply             to support flow in
                                                                                                                                                                                                  us to abstract water for                                      customers with drinking water            the River Thames
                                                                                                                                                                                                  drinking water supply                                                                                  Underground pipe

                         *In the detailed report of our draft plan we set out our intention to reduce leakage by 9 per cent by 2025. Over the last few months we
                         have listened to customers and stakeholders and as a result are now aiming for a minimum of 15 per cent reduction in leakage by 2025.

20                                                                                                                                                                                                                                                                                                                              21
Shape your water future
     In the longer term we will
     need more new water supply.                                                                                                                 A safe and reliable water supply is essential
                                                                                                                                                 for all our customers, a healthy environment                             Our draft Water Resources Management
     As set out on page 17 our preferred programme includes the           We will also continue to reduce leakage from our pipes, help our       and a prosperous economy. Tell us what you                               Plan 2019 covers an 80 year period,
     development of several new water supply options:                     customers to reduce their water use as well as explore innovative      think about our water plan.                                              from 2020 to 2100.
                                                                          approaches to new working practices.                                                                                                            It has three parts:
     • a reservoir in Oxfordshire which would provide up to 300 million                                                                          The public consultation starts in February 2018 and closes on
                                                                                                                                                                                                                          Overview (this document)
       litres of water per day in the 2040s                               We have used the most accurate and up to date information to           29 April 2018. We will publish the information on our website at
                                                                                                                                                                                                                          Main report - Executive summary and Sections 1-11
                                                                          develop our plan but it is impossible to be certain when you are       thameswater.co.uk/yourwaterfuture.
     • a water transfer from the Midlands using the Oxford canal which    looking a long way ahead. We will update and improve our forecasts                                                                              Technical Appendices – A to BB
       would provide 15 million litres of water per day around 2060       as we learn more over time, from government and our own analysis,                                                                               Go to thameswater.co.uk/yourwaterfuture to view
                                                                          and will continue to examine other new water supply options such as    How you can take part                                                    and download the documents
     • a water reuse scheme at Beckton in east London which would         water transfers.                                                       You can tell us your views in one of the following ways.
       provide up to 285 million litres of water per day over a 10 year
       period from the 2060s                                              The water transfers we have looked at involve buying water from        Note - All responses to the public consultation will be shared with
                                                                          other water companies in the Midlands, Wales and the North             the Secretary of State for the Environment, Food and Rural Affairs    What happens next?
     • an aquifer storage and recovery scheme in south east London        West and transferring it to the River Thames. At this stage these      (Defra).                                                              We’ll carefully consider all the responses we receive. In August 2018
       which would provide 3 million litres of water per day by 2070      transfers are not included in our plan as they were shown to be more                                                                         we’ll publish a report setting out the comments we received, and
                                                                          expensive than the reservoir and further work is needed on how and          Complete our online feedback form                                explaining how we have taken these into account in revising our
                                                                          when they would operate to ensure the water is available when it is         thameswater.co.uk/yourwaterfuture.                               plan. The report will be sent to everyone who has participated in the
                                                                          needed. We will continue to work closely with the other companies to                                                                         consultation and will also be published on our website.
                                                                          examine these options.                                                      Send your feedback by email to both Thames Water at
                 Section 11: Preferred programme                                                                                                      consultations@thameswater.co.uk and to Defra at                  We are also consulting on our draft Business Plan, which looks at
                                                                                                                                                      water. resources@defra.gsi.gov.uk                                what services we will deliver for our customers and how we will deliver
                                                                                                                                                                                                                       them over a five year period from 2020 – 2025. Any comments
                                                                                                                                                      Write via the Secretary of State for Environment, Food and       received on water resources matters from this consultation will be
                                                                                                                                                      Rural Affairs:                                                   taken into account in our water plan.

                                                                                                                                                       WRMP c/o Water Resources Policy,                                We will then submit our revised water plan to the Department for
                                                                                                                                                       Area 3D Nobel House                                             Environment, Food and Rural Affairs (Defra). The Secretary of State
                        Please give us your overall comments on our proposed plan.
                                                                                                                                                       17 Smith Square                                                 for Environment, Food and Rural Affairs, based on advice from the
                                                                                                                                                       London SW1P 3JR                                                 Environment Agency, and with consideration of the responses to the
                                                                                                                                                                                                                       consultation, will decide if it is necessary to have further discussion
                                                                                                                                                      A paper copy of the water plan will be available to view in      on our water plan or approve it.
                                                                                                                                                      our main office in Reading. To book an appointment please
       		                                                                                                                                             email: consultations@thameswater.co.uk.                          Thank you for taking the time to read this document
                        Please give us any specific comments on our plans to:                                                                                                                                          and helping us to shape your water future.
                        1. Reduce leakage                                                                                                             We will be holding several local drop-ins and discussion
                                                                                                                                                      forums throughout the consultation period to give you the
                        2. Continue our household metering programme                                                                                  chance to talk to us about our water plan and give us your
                        3. Promote the efficient use of water                                                                                         feedback. Go to thameswater.co.uk/yourwaterfuture to find
                                                                                                                                                      out where we will be and when.
                        4. Take more water from the River Thames at Teddington Weir
                        5. Provide new water supply in the longer term

                        Please give us any comments on the option to transfer water from
                        other water companies in the Midlands, Wales or the North West.

22                                                                                                                                                                                                                                                                                               23
14060-4 01/18
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