PFAS
The “forever chemicals” rule, as of 2026.
PFAS are a large family of man-made chemicals that break down very slowly. Here is where the federal drinking water rule stands.
2024
The final rule.
In April 2024 EPA set enforceable limits of 4.0 parts per trillion each for PFOA and PFOS, plus limits for PFHxS, PFNA, HFPO-DA (GenX) and a mixture of PFAS.
MAY 20, 2026
The proposed changes.
- Keep the PFOA and PFOS limits
- Rescind the limits for PFHxS, PFNA, HFPO-DA and the mixture
- Let qualifying systems that are granted an exemption move the PFOA/PFOS deadline from April 26, 2029 to April 26, 2031
These were proposals, not final rules, when published. Check EPA for the current status.
AT HOME
What you can do.
- Check your water report for PFAS results
- Look for filters certified under NSF/ANSI 53 or 58 for PFOA and PFOS
SOURCES
Where these facts come from.
QUESTIONS
Straight answers.
What is the PFAS limit in drinking water?
EPA’s limit for PFOA and PFOS is 4.0 parts per trillion each.