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 per 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 per 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.