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Affinity Water logo

Affinity Water supplies drinking water to people in parts of London, eastern and south eastern England

Anglian Water logo

Anglian Water supply water and water recycling services to people in the East of England and Hartlepool

Bristol Water logo

Bristol Water supplies drinking water for people in the city of Bristol and surrounding areas

Cambridge Water logo

Cambridge Water supplies drinking water to people in Cambridge

Welsh Water logo

Dŵr Cymru Welsh Water is a not-for-profit company which supplies drinking water and wastewater services to most of Wales and parts of western England that border Wales

Northern Ireland Water logo

Northern Ireland Water is the sole provider of water and sewerage services in Northern Ireland

Northumbrian Water logo

Northumbrian Water provides water and sewerage services in the English counties of Northumberland, Tyne and Wear, Durham and parts of North Yorkshire, and also supplying water as Essex and Suffolk Water

Portsmouth Water logo

Portsmouth Water provides water supply in the City of Portsmouth, part of East Hampshire and part of West Sussex

Scottish Water logo

Scottish Water delivers water and waste water services for Scotland 

SES Water logo

SES Water supplies water to east Surrey, West Sussex, west Kent and south London

Severn Trent Water logo

Severn Trent supplies water across the Midlands and Wales

South East Water logo

South East Water supplies drinking water in Kent, Sussex, Surrey, Hampshire and Berkshire

South Staffs Water logo

South Staffs Water serve parts of Staffordshire in the West Midlands as well as small areas of surrounding counties in England

South West Water logo

South West Water provides drinking water and waste water services throughout Devon and Cornwall and in small areas of Dorset and Somerset

Southern Water logo

Southern water is responsible for the public wastewater collection and treatment in Hampshire, the Isle of Wight, West Sussex, East Sussex and Kent, and for the public water supply and distribution in approximately half of this area

Thames Water logo

Thames Water is responsible for the public water supply and waste water treatment in most of Greater London, Luton, the Thames Valley, Surrey, Gloucestershire, north Wiltshire, far west Kent, and some other parts of England

United Utilities logo

United Utilities manages the regulated water and waste water network in North West England, which includes Cumbria, Greater Manchester, Lancashire, Merseyside, most of Cheshire and a small area of Derbyshire

Veolia Water logo

Veolia water is a water treatment company and part of an international group

Wessex Water logo

Wessex water supply water and sewerage services to an area of South West England including Bristol, most of Dorset, Somerset and Wiltshire and parts of Gloucestershire and Hampshire

Yorkshire Water logo

Yorkshire Water is a water supply and treatment utility company servicing West Yorkshire, South Yorkshire, the East Riding of Yorkshire, part of North Lincolnshire, most of North Yorkshire and part of Derbyshire, in England

Hafren Dyfrdwy logo

Hafren Dyfrdwy provides water only in Wrexham and parts of Denbighshire and Flintshire and both water and wastewater in northern Powys

Leep Utilities logo

Leep Utilities owns and operates regulated and non-regulated multi-utility networks across the UK

Associate Members

Irish Water logo

Uisce Éireann is a state-owned water utility company in Ireland

Guernsey Water logo

Guernsey Water is part of the States of Guernsey Trading Assets

Jersey Water logo

Jersey Water collect, treat and supply water for households and businesses in Jersey

Tideway logo

The Thames Tideway Tunnel is a 25 km combined sewer under construction, running mostly under the tidal section (estuary) of the River Thames across Inner London

Independent Water Networks logo

Independent Water Networks own and operate water and wastewater networks across the UK