Supporters and Affiliates

We find Waterwise's partnership approach and its relentless drive for ambition right across the sector refreshing and effective. It manages to be both supportive and challenging to us as an individual business and also to government and regulators to drive the policy changes we need to deliver our ambitious Target 100 water efficiency programme. We particularly welcome Waterwise's engagement on water efficiency of the non usual suspects within water companies, for example Chief Customer Officers through its Leadership Group - and with water retailers to drive the water efficiency we need to see in businesses.

Ian McAulay, Chief Executive, Southern Water

Why be a Waterwise Supporter or Affiliate?

Being a Waterwise Supporter or a Waterwise Affiliate means you are strengthening water efficiency in the UK. Your support contributes to Waterwise core funding, enabling us to be the principal independent voice and thought leader for water efficiency in the UK. Our research, policy, strategy and campaigns work, staff expertise, networks, support of water-efficient products and services and events add value to our Supporters’ own water efficiency programmes and release greater ambition. Waterwise Supporters and Affiliates also receive a range of tailored benefits.

Waterwise is a not-for-profit organisation – our central aim is that water is used wisely every day, everywhere in the UK. So all Supporter and Affiliate funds are invested directly in driving greater water efficiency in the UK.

We’re very grateful to our Supporters and Affiliates for enabling us to continue to be the leading independent voice on water efficiency in the UK, driving the change necessary for people, the environment and the economy.

Find Out More

Our Supporters

Affinity Water

Affinity Water are the largest water-only supplier in the UK and they are committed to delivering a high quality water service to all their customers.

Affinity Water provide on average 950 million litres of water each day to a population of more than 3.6 million people in parts of Bedfordshire, Berkshire, Buckinghamshire, Essex, Hertfordshire, Surrey, the London Boroughs of Harrow and Hillingdon and parts of the London Boroughs of Barnet, Brent, Ealing and Enfield. They also supply water to the Tendring peninsula in Essex and the Folkestone and Dover areas of Kent.

Anglian Water

Anglian Water serves the largest, driest water company region in England and Wales, receiving only two-thirds of UK average annual rainfall and has one of the fastest rates of new housing growth. In 2019 they became the largest public interest company in the UK by changing our Articles of Association to formally enshrine the public interest within the constitutional make up of the business.

Business Stream

Business Stream is one of the largest water retailers in the UK and a trusted supplier to over 340,000 forward-thinking businesses. The retailer has to date helped its business and public sector customers save more than £242 million and conserve over 43 billion litres of water. As passionate advocates of water efficiency, Business Stream was the first water retailer to become a partner of Waterwise and was recently awarded the Waterwise Water Efficiency Checkmark.

Essex and Suffolk Water

Essex & Suffolk Water (ESW) provides water services to 794,000 properties in the south east of England. Our Essex area has a population of 1.5 million and is part rural, part urban. We serve a population of 0.3 million in our Suffolk area, which is mainly rural.

Under the banner of ‘Every Drop Counts’, our award-winning water efficiency programmes take an innovative, community-focused and leading approach to helping our customers save water.

Dee Valley Water

Natural Resources Wales

Natural Resources Wales is the regulatory body responsible for managing water resources in Wales. We balance the water needs of the environment and society and encourage water efficiency to support the economy, safe-guarding wellbeing now and for the future.

We face challenges from climate change and an increasing population which will impact on our water resources and the ways we will have to manage them. We will achieve this by continuing to regulate the abstraction of water, monitor the environment and by working closely with Waterwise, the water industry and other abstractors to manage resources efficiently. 

NI Water

Northern Ireland Water is a Government Owned Company (GoCo), set up in April 2007 to provide the water and sewerage services in Northern Ireland. That means we supply 575 million litres of clean water a day for almost 1.8 million people as well as treating 340 million litres of wastewater a day.

Northumbrian Water

Northumbrian Water Limited (NWL) provides water and wastewater services to 1.3 million properties, and 2.7 million people in the north east of England. Our major population centres are Tyneside, Wearside and Teesside, and we also serve large rural areas in Northumberland and County Durham. We provide wastewater services only in Hartlepool.

Under the banner of ‘Every Drop Counts’, our award-winning water efficiency programmes take an innovative, community-focused and leading approach to helping our customers save water.

Portsmouth Water

Portsmouth Water is one of the oldest water companies in the country, having been incorporated in 1857.  We serve 316,000 homes and businesses in an area covering 868 square kilometres (335 square miles) from the River Meon in Hampshire to the River Arun in West Sussex. The water we supply  is derived from the chalk of the South Downs and is abstracted from wells, boreholes, springs and the River Itchen. Our springs at Havant and Bedhampton are thought to be the largest group of springs used for public supplies in Europe.

As part of our plans to ensure we protect both the environment our customers live in and also the supply of water they drink, we are seeking to help everyone to use water wisely – through school programmes, local engagement events and, of course, working with organisations such as Waterwise to promote our message.

Scottish Water

Scottish Water is a publicly owned water company which provides water and waste water services to 2.46 million household customers and wholesale Licensed Providers across Scotland.

SES Water

We have ambitious plans to manage demand over the next five years, including reducing household consumption by 7% under our Every Drop Counts programme. This involves a wide range of approaches – from educating schoolchildren to home water efficiency check visits, supported by working in collaboration with local authorities, community & environmental groups and Regulators.

Severn Trent

Helping customers understand their water use and how they can use water more wisely in their homes is a key objective for us at Severn Trent. This is to ensure we can meet future customer demand whilst protecting the natural environment. Our relationship with Waterwise provides a platform to promote water efficiency activities already in place, share best practice and encourage more of our customers to be water efficient.

Southern Water

Southern Water supplies drinking water to more than two million customers, and treats and recycles wastewater for more than four million customers across Kent, Sussex, Hampshire and the Isle of Wight. Its vision is to create a resilient water future for customers in the South East.

South Staffs

South East Water

South East Water supplies top quality drinking water to 2.2 million people in the south east of England. Through a network of 14,780 kms of pipe, they deliver around 520 million litres of water every day. Relying on a secure supply of our natural resource – water, the company takes their role as guardians of the environment seriously.

South West Water

Come rain or shine, saving water makes sense. By being water smart you can save money off your water bill and help protect the environment. The average person in our region uses 143 litres of water in a day, by the end of 2025 we want to get that down to 128 litres. Small changes in water use, avoiding waste, can make a big difference when multiplied by the 1.7 million people we serve.

Thames Water

Thames Water has 15 million customers, and is delivering the UK’s largest water efficiency programme. In parallel with a smart meter rollout, Thames Water’s annual water efficiency initiatives include; 70,000 Smarter Home Visits, nearly 4,000 Smarter Business Visits, 6,000 in-home retrofits with Housing Association partners, education programme and retrofits for schools, an online Water Energy Calculator, incentives for smart metered customers, and new ‘discretionary water use’ work streams with the EA and industry. 

United Utilities

Wave Utilities

Wave is one of the UK’s largest water retailers, helping businesses achieve better efficiency and sustainability. We support over 300,000 businesses, from SMEs and large industrial and commercial sites to local authorities, schools, universities and NHS Trusts. We work with our customers to drive down water and energy use, helping organisations to shrink their carbon footprint and save money on utilities. We’re working with Waterwise to help promote better business water efficiency as part of our ongoing commitment to maximising natural resources.

Welsh Water

Welsh Water are committed to promoting the efficient use of water. Our customers can visit our bespoke online webpage and take advantage of free promotional product offers and read through our helpful water saving tips. We have pledged to support local communities across the country, through our Community Resilience Projects and collaborative working to ensure all customers can access our water efficiency services. Our water efficiency programme is strengthened further by our relationship with Waterwise, who are key partners in helping spread water efficiency message and awareness throughout the UK.

Wessex Water

Wessex Water provides water and/or sewerage services to more than 2.8 million customers across the south west of England, including Dorset, Somerset, Bristol, most of Wiltshire and parts of Gloucestershire and Hampshire. Owned since 2002 by family-run Malaysian company YTL, Wessex Water is run by local employees who are customers themselves and members of the communities they serve.

Yorkshire Water

Our Associate Supporters

Irish Water

‘At Irish Water, sustainability is central to all of our activity.  Water conservation has a key role to play in the sustainability agenda.  Waterwise do excellent work in the UK and beyond, especially in their engagement with governments, industry, business and domestic customers and through their push for  innovation and ambition on water efficiency. For that reason we are delighted to be a Waterwise Associate Supporter’ – Sean Laffey, Director, Asset Management and Sustainability, Irish Water.

Our Higher Tier Affiliates

Methven UK

Established for over 130 years Methven is a global manufacturer of beautifully designed, innovative and award winning showers, taps and valves. Methven hold three of six worldwide patents for showering technology and are committed to conserving energy and water. Its innovative shower technologies are all optimised at 9 litres per minute without any compromise on performance.

Our Regular Affiliates


Advizzo is a software-as-a-solution company, Advizzo transforms the way customers think about their water consumption, as well as the way utility companies engage with their customers. We combine data science and behavioural science to develop innovative interventions to empower customers to change their behaviours.


Arqiva is at the heart of the broadcast and utilities sectors in the UK and beyond, providing critical communications infrastructure and media services.

We are the only supplier of national terrestrial television and radio broadcasting services in the UK, consistently delivering digital TV, analogue and digital radio to people in all four corners of the country. We distribute over 1,000 channels internationally using our fibre and satellite infrastructure. Our advanced, secure and dedicated networks are also supporting the management of critical data for a range of smart metering networks in the energy and water sectors.

Our teams are behind the scenes, delivering millions of vital connections every day for our customers – major UK and international broadcasters, independent radio groups as well as major utility companies and networks. They include leading brands such as the BBC, ITV, Sky, Global, Bauer, Thames Water and Anglian Water. 

For more information, news and insights from Arqiva, please visit the website below.


Artesia is a dynamic and forward thinking consultancy based round data science, serving the water sector since 2008. We work with our client’s to solve their challenging water management problems by combining our extensive water industry knowledge with data science.  We provide leading edge solutions for leakage management, water resources planning, water conservation, demand forecasting, network and asset management.


BabyDam is the creator of a bathwater barrier that is designed to help busy eco‐conscious parents everywhere save water, time, money and space by just using the amount of water needed in the bath when bathing newborn babies and small infants. By fitting a BabyDam you can save up to 56 litres of water each bath! 


Cenergist is a leading water efficiency specialist working with UK Water Companies in the domestic and commercial sectors.  As well as delivering large-scale programmes, the company is also the UK distributor for the Control Flow HL2024 family of products.  These reduce water wastage caused by flow fluctuations and have been found to reduce household consumption by up to 24% per annum. 

Groundbreaker Systems

Our current range of products not only provide the perfect platform for smarter water metering, but also facilitate the designing out potential leak paths on water services, an efficient method of replacing lead water pipes and now, by far the most efficient method of reducing per capita consumption cost effectively without the need to enter a property. 


A leading influencer and trusted advisor in the utilities industry, Skewb provide simple, effective solutions to complex problems; addressing challenges for instance evolving regulations and climate change, which enables customers to improve efficiency, customer experience and organisation design.

Implementing innovative digital solutions and products, Skewb offer a more interactive experience for users, providing higher levels of service to customers encouraging proactive outcomes.

Collaboration with customers and industry partners is fundamental to solutions benefiting customers, the consumer and the environment.