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PFAS in Coraopolis Water & Sewer Auth drinking water
EPA UCMR 5 results for public water system PA5020010 serving Allegheny County (Pennsylvania). 7 of 29 PFAS detected.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
All PFAS detected
| PFAS | Highest result (ppt) | Samples with detection | EPA limit (2024 rule) |
|---|---|---|---|
| PFOS (perfluorooctane sulfonic acid) | 18.8 | 5 of 6 | 4.0 ppt (MCL, 2024 rule) |
| PFBS (perfluorobutane sulfonic acid) | 14.6 | 2 of 6 | Hazard Index component (2024 rule; proposed for rescission) |
| PFHxS (perfluorohexane sulfonic acid) | 12.6 | 4 of 6 | 10 ppt (2024 rule; proposed for rescission) |
| PFBA (perfluorobutanoic acid) | 6.2 | 2 of 6 | — |
| PFOA (perfluorooctanoic acid) | 5.2 | 2 of 6 | 4.0 ppt (MCL, 2024 rule) |
| PFHxA (perfluorohexanoic acid) | 3.2 | 2 of 6 | — |
| PFPeA (perfluoropentanoic acid) | 3.1 | 1 of 6 | — |
ppt = parts per trillion (ng/L). EPA reports UCMR 5 results in µg/L; we multiply by 1,000. “Samples with detection” counts results at or above the UCMR 5 minimum reporting level.
What the limits mean
In April 2024 EPA set enforceable limits (MCLs) of 4.0 ppt each for PFOA and PFOS, plus 10 ppt for PFHxS, PFNA and HFPO-DA (GenX) and a Hazard Index for mixtures, with compliance based on a running annual average at each sampling point and due in 2029 (EPA ↗). In May 2026 EPA proposed letting systems request two more years for PFOA/PFOS (to April 2031) and rescinding the PFHxS, PFNA, GenX and Hazard Index limits (EPA: extension proposal ↗ · EPA: rescission proposal ↗). These are proposals, not final rules, as of the date this page was built.
What you can do
- Ask your water utility for its latest PFAS results and plans; its annual water quality report (Consumer Confidence Report) is a good place to start (EPA: Consumer Confidence Reports ↗).
- Read EPA's information on the PFAS drinking water rule (EPA PFAS rule page ↗).
- Home filters: EPA's fact sheet says filters certified to NSF/ANSI 53 or NSF/ANSI 58 (reverse osmosis) for PFAS reduction, such as PFOA and PFOS, are available; check the packaging or the certifier's directory (EPA home filter fact sheet ↗). We do not recommend specific products.
- We do not give medical advice. For health questions, see EPA's resources and talk to a health professional.
Other tested systems in the same area
- Brackenridge Boro Water Dept (PA5020006, 0 PFAS detected)
- Moon TWP Muni Auth (PA5020011, 3 PFAS detected)
- Duquesne Water Dept (PA5020012, 0 PFAS detected)
- Edgeworth Boro Muni Auth (PA5020015, 0 PFAS detected)
- Richland TWP Water Authority, PA (PA5020018, 0 PFAS detected)
- Hampton Shaler Water Authority (PA5020019, 0 PFAS detected)
- West Cnty Muni Auth-Mckeesport (PA5020025, 0 PFAS detected)
- Monroeville Municipal Auth (PA5020027, 1 PFAS detected)