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Other PFAS monitored in UCMR 5 in drinking water

Also called PFHpA, PFDA, PFBA, PFHxA, PFPeA, 6:2 FTS, ADONA.

Legal limit
None
Health goal
None

Values in parts per trillion (ppt). Comes from the source.

Limits checked Oct. 4, 2026

Where the rules stand

No federal MCLs for these 23 PFAS. EPA measured them under UCMR 5 to learn how often they occur. EPA's July 2026 summary is the final UCMR 5 dataset.

Is it in your water?

Matched to your utility using EPA records.

What EPA says about health

EPA has not set drinking water limits for these PFAS. EPA's UCMR 5 summary lists non-regulatory reference levels for only two: PFBA at 6,000 ppt and PFHxA at 3,000 ppt, both USGS screening levels.

Where it comes from

PFAS have been used since the 1940s in products like nonstick cookware, food packaging, waterproof clothing, stain-resistant furniture and firefighting foam. They last a long time in the environment and can reach drinking water sources.

What handles it

  • NSF/ANSI 53

    Claim to look for: Total PFAS Reduction

    Same claim, other certifiers’ wording: Perfluoroheptanoic Acid (PFHpA)

    Of these 23, only PFHpA and PFDA are in the Total PFAS footnote on NSF listings.

    WQA listing wording. Covers PFHpA only.

Filters with that claim on a certifier’s listing

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Sources

  1. The Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) Data Summary: July 2026 (EPA 815-S-26-007), U.S. EPA. Checked Oct. 4, 2026.
  2. NSF listings for the NSF/ANSI 53 "Total PFAS Reduction" claim (footnotes define Total PFAS), NSF. Checked Oct. 4, 2026.
  3. Find WQA Certified Products (Gold Seal listings by standard and claim), Water Quality Association. Checked Oct. 4, 2026.

Where to go next

  • NSF/ANSI 53, decoded

    What a NSF/ANSI 53 listing covers, and the claim to look for.

    About NSF/ANSI 53

  • Filters, checked

    Every filter TapBuff has checked against a certifier’s listing, with five-year costs.

    Compare filters

  • Every contaminant

    Legal limits, health goals and what handles each one.

    All contaminants