Sampling and analysis

Each year, we carry out approximately 120,000 tests on around 13,000 samples taken from every point in our supply chain. Water sources, treatment works, storage reservoirs and randomly selected customers' taps all come under scrutiny. We regularly achieve more than 99.9 per cent compliance with industry standards.

Our laboratory holds UKAS accreditation, an internationally recognised quality standard which covers all aspects of its operation from sampling and analysis through to reporting the results.

We publish our own water quality report once a year, so if you'd like to find out more download our latest report.