Thames Water Utilities Ltd

Water supply arrangements

Company Assets

Number of treatment works

106

Number of service reservoirs 

419

Number of water supply zones

258

Length of mains pipe (km)

31,750km

Population Served

Population Supplied

10,068,000

Number of local authorities

71

Water Supplied

Water Supplied (l/day)

2,799,290,000 

Percentage from surface sources

75%

Percentage of ground sources

25%

Percentage from mixed sources

0%

Area of supply

Barnet, Bexley, Brent, Bromley, Buckinghamshire, Camden, City of London, Croydon, Ealing, Enfield, Essex, Gloucestershire, Greenwich, Hackney, Hammersmith and Fulham, Hampshire, Haringey, Hertfordshire, Hounslow, Islington, Kensington and Chelsea, Kent, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Oxfordshire, Reading, Redbridge, Richmond upon Thames, Slough, Southwark, Surrey, Swindon, Tower Hamlets, Waltham Forest, Wandsworth, West Berkshire, Westminster, Wiltshire, Windsor and Maidenhead, Wokingham  

Consumer Contacts

Informing Consumers

Company Figure

Total Number

Rate pet 1,000 population

2019

12,808

1.25

2020

80,960

8.22

2021

234,988 

23.39

Industry Average

2021

9,913.96

1.22

Acceptability of water to consumers

Company Figure

Total Number

Rate pet 1,000 population

2019

6,302

0.62

2020

5,359

0.54

2021

4,949

0.49

Industry Average

2021

2,832.12

1.08

Complaints to the Drinking Water Inspectorate

A total of 6 consumers of Thames Water Utilities Ltd directly contacted DWI in 2021.

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