Welcome to the
Drinking Water Inspectorate
The Drinking Water Inspectorate (DWI) was formed in 1990 to provide independent reassurance that
water supplies in England and Wales are safe and drinking water quality is acceptable to consumers.
Assessment of the limitations for chemicals and treatment products intended for the treatment of drinking water.
Chloramination disinfection and associated risks of cyanide formation in treated water
Green economic recovery – the water industry’s role in building a resilient future
The reports cover the quality of public drinking water supplies and reports on the progress of local authorities in the regulation of private water supplies.…
Regions in England and Wales
Use our map to find your local water company
Find contact details, report a problem, look at incidents in your area.
See ongoing improvement in your area, how your water company is improving and find the water quality in your area.
Find your local company
If you are concerned about the quality of your drinking water you should contact your water company in the first instance. A number for your water company can be found here.