PFAS in tap water, Beaver County, Pennsylvania
3 of 11 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Beaver Boro Muni Auth, 40.1 ng/L. 2 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
11 community water systems · 151,706 people served · newest sample November 17, 2025
Water systems in Beaver County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Beaver Falls Muni Auth | 49,500 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 1 | July 8, 2024 |
| Ambridge Water Auth | 19,500 | below the 3 to 4 ng/L reporting limit | 1 | March 13, 2024 |
| Center TWP Water Auth | 19,000 | below the 3 to 4 ng/L reporting limit | 1 | February 26, 2025 |
| Mun Water Auth of Aliquippa | 15,685 | below the 3 to 4 ng/L reporting limit | 1 | August 5, 2025 |
| Creswell Heights Jt Auth | 15,000 | below the 3 to 4 ng/L reporting limit | 1 | July 17, 2024 |
| Brighton TWP Muni Auth | 7,920 | 11.9 ng/L | 1 | July 15, 2024 |
| Monaca Boro Water Dept | 6,500 | 11.1 ng/L | 1 | October 28, 2024 |
| Beaver Boro Muni Auth | 5,799 | 40.1 ng/L above the 2029 federal MCL | 1 | November 18, 2024 |
| North Sewickley Mun Water Auth | 4,578 | below the 3 to 4 ng/L reporting limit | 2 | November 17, 2025 |
| New Sewickley TWP Muni Auth | 4,276 | below the 3 to 4 ng/L reporting limit | 3 | December 19, 2023 |
| Baden Boro Water Dept | 3,948 | below the 3 to 4 ng/L reporting limit | 1 | October 21, 2025 |
Not sure which one is yours? The systems report their own service areas to EPA. Check your water bill or your utility's Consumer Confidence Report.
ZIP codes in Beaver County
Census ZIP code tabulation areas that overlap the county. A ZIP served by one system opens that system's page; a ZIP shared by several systems lists them.
How to read these numbers
We compare PFAS-4 (PFOA + PFOS + PFNA + PFHxS) with this site's 0.5 ng/L benchmark, the same line as on the European pages. UCMR 5 reporting limits are 3 to 4 ng/L. So any quantified PFAS-4 compound is above the benchmark, and a clean result reads "below the 3 to 4 ng/L reporting limit", never zero. The US legal limit is the 4 ng/L federal MCL for PFOA and PFOS, which systems must meet from April 26, 2029 ("above the 2029 federal MCL").
EPA: "UCMR 5 results do not indicate compliance or noncompliance with the PFAS drinking water standards". Samples are taken where water enters the distribution system, not at your tap. A system may have changed sources or added treatment since. Source: U.S. Environmental Protection Agency (EPA), Office of Water, PFAS National Primary Drinking Water Regulation (NPDWR). Regulation details retrieved September 19, 2026. Every system page tracks the 2029 compliance date and the proposed rescission of the PFHxS, PFNA, HFPO-DA and Hazard Index limits.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.