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

To ask the Secretary of State for Environment, Food and Rural Affairs, whether she plans to establish new statutory action standards for PFAS in drinking water.

The Drinking Water Inspectorate published a report on 26 February 2025 recommending revisions to some of the parameters listed in the drinking water regulations; this included a new standard for PFAS. Defra and the DWI will work together to consider potential regulatory updates to England’s drinking water quality legislation based on these recommendations. DWI have issued guidance to water companies on PFAS. Concentrations of ‘sum of 48 PFAS’ reported as greater than 0.1 micrograms (or 100 nanograms) must be reported to the DWI as a water quality event and all necessary actions to reduce concentrations below this value must be taken. There is no evidence of PFAS above 0.1 micrograms (or 100 nanograms) in drinking water supplies.