Contaminant · PFOS
What water filters remove PFAS
PFOS
The short answer
PFOS reduction is certified under NSF/ANSI 53 and NSF/ANSI 58. The federal MCL is 0.000004 mg/L.
Of the 1 system in our database that advertise PFAS reduction, 1 holds a matching third-party listing.
- NSF/ANSI 53NSF/ANSI 53 permits this claim, but no system we hold carries it under that standard.
- NSF/ANSI 581 of the 1 certified systems we hold carry this claim under NSF/ANSI 58.
Regulatory status · United States
- Current federal limit
- 4.0 ppt
- PFOS. Parts per trillion.
- Status
- ~In force, change pending
- Utilities must comply by 2029.
- Pending change
- EPA proposed on May 18, 2026 a federal exemption under SDWA 1416(f) and 1450(a)(1) extending compliance from April 26, 2029 to April 26, 2031. The extension is NOT automatic. A system must request it and be granted it. Systems with a PFOA or PFOS result at or above 12 ppt must commit to at least two interim control measures during the exemption period. Comment period closed July 20, 2026. Docket EPA-HQ-OW-2025-1742. Proposed, not final.
This limit is not settled. We re-check the federal register entry every two weeks and stamp this panel with the date of the last check. Treat any figure you read elsewhere without an as-of date as unreliable.
Certified to reduce PFOS
1 systemEvery row below has a matching listing in a certifier database, checked on 20 Sep 2026. Sorted by FilterSpecs score.
| System | Score | Reduction | Standard | Price |
|---|---|---|---|---|
| GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System | 5.9 | Not published | NSF/ANSI 58 | $259.99 |
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Reduction figures are the certified performance in the listing, not manufacturer marketing. See methodology.