Dŵr Cymru Welsh Water

Water supply arrangements

Company Assets
Number of treatment works	61
Number of service reservoirs	312
Number of water supply zones	76
Length of mains pipe (km)	25,277km

Population Served
Population Supplied	2,949,000
Number of local authorities	23

Water Supplied
Water Supplied (l/day)	832,988,000
Percentage from surface sources	95%
Percentage of ground sources	4%
Percentage from mixed sources	1%

Area of supply

Blaenau Gwent, Bridgend, Caerphilly, Cardiff, Carmarthenshire, Ceredigion, Conwy, Denbighshire, Flintshire, Gwynedd, Herefordshire, County of, Isle of Anglesey, Merthyr Tydfil, Monmouthshire, Neath Port Talbot, Newport, Pembrokeshire, Powys, Rhondda Cynon Taf, Swansea, Torfaen, Vale of Glamorgan

Consumer Contacts

Informing Consumers

Company Figure	Total Number	Rate per 1,000 population
2019	582	0.19
2020	493	0.16
2021	627	0.20
Industry Average
2021	9,913.96	1.22

Acceptability of water to consumers

Company Figure	Total Number	Rate per 1,000 population
2019	9,167	2.96
2020	8,833	2.82
2021	8,027	2.55
Industry Average
2021	2,832.12	1.08

Complaints to the Drinking Water Inspectorate

A total of 3 consumers of Dŵr Cymru Welsh Water Services Ltd directly contacted DWI in 2021.