Question to the Department for Environment, Food and Rural Affairs:

To ask His Majesty's Government what assessment they have made of reports that the Drinking Water Inspectorate found that more than 11,000 samples had tested positive for perfluoroalkyl and polyfluoroalkyl substances in 2022.

Although detected in a tiny number of raw water samples, there is no evidence of perfluoroalkyl and polyfluoroalkyl substances (PFAS) concentrations above the 0.1 µg/l guideline value in drinking water supplies. The Government is aware of the 3.8% of water samples that tested positive for PFAS in 2022. The Drinking Water Inspectorate (DWI) has assessed these results and provided further direction to companies to develop appropriate and focused strategies to protect drinking water supplies going forward. Work is continuing across Government, which the DWI is involved in, to help us assess levels of PFAS occurring in the environment, their sources and potential risks to safeguard current high drinking water quality and ensure our regulations remain fit for purpose.