United Kingdom water companies

United Kingdom water and sewerage companies
Anglian Scottish Northern; Ireland Thames Southern South; West Welsh Severn; Trent Wessex Northumbrian United; Utilities Yorkshire
Water only suppliers not shown

Water supply and sanitation in the United Kingdom is provided by a number of water and sewerage companies. Twelve companies and organisations provide drainage and sewerage services, each over a wide area, to the whole United Kingdom; and supply water to most customers in their areas of operation. There are also 'water only' companies which supply water in certain areas. Some companies are licensed to supply water or sewerage services using the networks of other providers.

England

In England and Wales the economic regulator of water and sewerage is Ofwat and the quality regulator is the Drinking Water Inspectorate.^[1]

Water and sewerage

Company	Service area	Major shareholders	Website
Anglian Water	East of England	Camulodunum Investments (15%), CPP Investments (33%), IFM Investors (20%), Igneo Infrastructure Partners (15%), Infinity Investments (17%)^[2]	Official website
Northumbrian Water	North East England	Northumbrian Water Group	Official website
Severn Trent Water	West Midlands, East Midlands, Chester	As at 1 March 2017, the company's issued share capital consists of 239,791,170 ordinary shares of 97 17/19 pence each with voting rights. As at 1 March 2017, the company holds 4,080,964 shares in Treasury.^[3] Listed on London Stock Exchange)	Official website
Southern Water	South East England	Greensands Holdings	Official website
South West Water	South West England	Pennon Group	Official website
Thames Water	Greater London, Thames Valley	Kemble Water	Official website
United Utilities	North West England	N/A, listed on London Stock Exchange	Official website
Dŵr Cymru	West Midlands, (Wales)	Glas Cymru Holdings	Official website
Wessex Water	South West England	YTL Corporation	Official website
Yorkshire Water	Yorkshire and the Humber	Kelda Group	Official website

Water only

Company	Supply area	Owner	Website
Affinity Water	Central region: Amersham, Barnet, Beaconsfield, Bishop's Stortford, Harlow, Harrow, Hemel Hempstead, Letchworth, Luton, Saffron Walden, St Albans, Staines, Stevenage, Uxbridge, Watford, Welwyn Garden City, Woking East region: Brightlingsea, Clacton-on-Sea, Frinton-on-Sea, Harwich, Manningtree, Wivenhoe Southeast region: Dover, Folkestone, Hythe, Romney Marsh, Dungeness, Lydd	Allianz/HICL Infrastructure/DIF Tamblin	Official website
Albion Water	Knowle Village (Hampshire), Oaklands Hamlet (Chigwell), Upper Rissington (Gloucestershire)	Albion Water Group Limited	Official website
Bournemouth Water	Bournemouth, Christchurch, Lymington, Ringwood, Verwood, Wimborne Minster	Pennon Group	Official website
Bristol Water	Bristol, Burnham-on-Sea, Frome, Tetbury, Wells, Weston-super-Mare	Pennon Group	Official website
Cambridge Water Company	Cambridge, St Ives	South Staffordshire Water	Official website
Cholderton and District Water Company	Amport, Bulford, Cholderton, Quarley, Shipton Bellinger, Thruxton	Cholderton Estate	Official website
Essex and Suffolk Water	Essex region: Basildon, Brentwood, Chelmsford, Southend-on-Sea, Thurrock, Barking and Dagenham, Havering, Redbridge Suffolk region: Aldeburgh, Eye, Great Yarmouth, Lowestoft, Southwold	Northumbrian Water Group	Official website
Hartlepool Water	Hartlepool	Anglian Water	Official website
Portsmouth Water	Bognor Regis, Chichester, Fareham, Gosport, Havant, Hayling Island, Portsmouth	Ancala
South East Water	Eastern region: Ashford, Canterbury, Eastbourne, East Grinstead, Haywards Heath, Maidstone, Sevenoaks, Tonbridge, Royal Tunbridge Wells, Whitstable Western region: Aldershot, Basingstoke, Bracknell, Camberley, Maidenhead, Petersfield, Wokingham	Utilities Trust of Australia/Desjardins Group/NatWest Group Pension Fund
South Staffordshire Water	Aldridge, Brownhills, Burton upon Trent, Cannock, Kinver, Lichfield, Rugeley, Sutton Coldfield, Tamworth, Uttoxeter, Walsall, West Bromwich	Independent
Sutton and East Surrey Water	Cobham, Dorking, Horley, Leatherhead, Oxted, Redhill, Reigate, Sutton	Pennon Group^[4]
Youlgrave Waterworks	Youlgrave	Independent non-profit	Official website

Wales

Company	Service area	Parent	Website
Dŵr Cymru	Wales, (West Midlands)	Glas Cymru	Official website
Hafren Dyfrdwy	Wrexham, Powys	Severn Trent	Official website

Scotland

Scottish Water (government)

Business users receive the services via a licensed provider and Scottish Water act as wholesaler.^[5]

Northern Ireland

Northern Ireland Water (government)

Crown dependencies

Jersey Water (government, with minority private shareholding)^[6]
Guernsey Water (government)
Manx Utilities Authority (government)

References

↑ "Company locations - DWI, UK". Dwi.defra.gov.uk. 2015-12-08. Retrieved 2016-12-23.
↑ Ownership & Structure Anglian Water
↑ https://otp.tools.investis.com/clients/uk/severn_trent_plc/rns/regulatory-story.aspx?cid=1487&newsid=849180
↑ "Sutton And East Surrey Water plc persons with significant control - Find and update company information - GOV.UK". Companies House. 2016-04-06. Retrieved 2024-02-24.
↑ "Scotland on Tap". Archived from the original on 2008-03-09.
↑ 2025 Annual Report and Financial Statements (PDF) (Report). The Jersey New Waterworks Company Limited (Jersey Water). 17 December 2025. p. 49. Retrieved 9 August 2026.

[1] "Company locations - DWI, UK". Dwi.defra.gov.uk. 2015-12-08. Retrieved 2016-12-23.

[2] Ownership & Structure Anglian Water

[3] ttps://otp.tools.investis.com/clients/uk/severn_trent_plc/rns/regulatory-story.aspx?cid=1487&newsid=849180

[4] "Sutton And East Surrey Water plc persons with significant control - Find and update company information - GOV.UK". Companies House. 2016-04-06. Retrieved 2024-02-24.

[5] "Scotland on Tap". Archived from the original on 2008-03-09.

[6] 2025 Annual Report and Financial Statements (PDF) (Report). The Jersey New Waterworks Company Limited (Jersey Water). 17 December 2025. p. 49. Retrieved 9 August 2026.

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