Written Question·Department for Environment, Food and Rural Affairs·UIN 68301

Drinking Water: Per- and Polyfluorinated Alkyl Substances

Tabled: 15 July 2025
Answered: 22 July 2025

Question

Helen Maguire

Liberal Democrat — Epsom and Ewell

To ask the Secretary of State for Environment, Food and Rural Affairs, whether his Department has made an assessment of the public health risks associated with PFAS contamination in drinking water; and if he will publish a list of affected catchment areas

Answer

Emma Hardy
Since August 2024, the Drinking Water Inspectorate (DWI) guidance has set a guideline limit of 100 nanograms for the sum of 48 named PFAS. The limit was agreed with the UK Health Security Agency to be a robust level with an appropriate margin to ensure ou...
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