Water quality in your area

We are committed to delivering high quality water, so we check water leaving our treatment works, at service reservoirs and at customers’ taps.

This is part of our regulatory monitoring programme. The vast majority of the results comply with the standards set in the Water Supply (Water Quality) Regulations 2016, confirming that drinking water quality continues to be of a very high standard.

In 2019, we carried out over 190,000 tests on our water and our overall compliance performance was 99.97% while our Mean Zonal Compliance (MZC), the measure used by The Drinking Water Inspectorate (DWI), was 99.97%.