Water quality in Wales
Water quality across Cardiff, Swansea, Newport and rural Wales. Supplied by Dŵr Cymru Welsh Water.
According to TapWater.uk's analysis, Wales scores 9.5/10 for drinking water quality in 2026, based on data from 19 postcode districts.
9.5
Avg score /10
19
Areas tested
1
Suppliers
0
PFAS detections
Tap water in Wales has an average safety score of 9.5 out of 10 based on testing across 19 postcode districts. Water is supplied by Dŵr Cymru Welsh Water. The overall water quality is good. Data is sourced from the Environment Agency and water company testing via the Stream Water Data Portal.
Try your postcode — e.g. SW1A, M1, B1
Cities in Wales
Average water quality score by city.