My water supply

Water quality standards

We pride ourselves on delivering some of the highest quality water to our customers.

On a typical day, we treat 330 million litres of water to make it clean and pleasant to drink. It’s then supplied to 500,000 homes and 36,000 business customers.

Each year we carry out thousands of tests on samples we have taken from treatment works, reservoirs and homes across the region.

Water quality reports

The samples are analysed in a UKAS accredited laboratory to ensure they comply with drinking water safety standards.

View the report for your area: 

Not sure which zone you're in? Check our list of zones:

Water quality terms

Find out what the technical terms used in the water quality reports mean. 


Drinking Water Inspectorate

Find out more about our Regulators