Question 1

What is PFAS?

Accepted Answer

PFAS (per- and polyfluoroalkyl substances) are a group of over 10,000 synthetic chemicals known as 'forever chemicals' because they do not break down in the environment. They are used in non-stick coatings, waterproof clothing, food packaging, and firefighting foam. PFAS have been linked to health risks including cancer, thyroid disease, and immune system suppression.

Question 2

Is UK tap water safe from PFAS?

Accepted Answer

The UK currently has no legal limit for PFAS in drinking water. While water companies are not required to test for or remove PFAS, Environment Agency monitoring has detected PFAS in water sources near several major cities. The EU set a binding limit of 0.1 µg/L for total PFAS from January 2026, but the UK has not adopted this standard.

Question 3

Which UK cities have PFAS in their water?

Accepted Answer

PFAS monitoring data is currently being collected. Check back soon for city-level results.

Question 4

What is the UK legal limit for PFAS in water?

Accepted Answer

As of 2026, the UK has no legal limit for PFAS in drinking water. The Drinking Water Inspectorate (DWI) has issued guidance values but these are not legally binding. By contrast, the EU set a binding limit of 0.1 µg/L for total PFAS in January 2026, and the WHO recommends the same threshold.

Question 5

How do I remove PFAS from my water?

Accepted Answer

Reverse osmosis (RO) filtration is the most effective method for removing PFAS from drinking water, removing over 95% of PFAS compounds. Activated carbon filters can reduce some PFAS but are less effective. Standard jug filters like BRITA do not remove PFAS. For home use, an under-sink RO system is the most reliable option.

Question 6

Should I be worried about PFAS in UK water?

Accepted Answer

While PFAS detection in water sources is a concern, it does not necessarily mean your tap water contains PFAS at harmful levels. Water treatment can reduce PFAS concentrations. However, the lack of UK regulation means there is no legal requirement to test for or remove PFAS. If you are concerned, a reverse osmosis filter is the most effective home solution.