PFAS in tap water, Berks County, Pennsylvania
6 of 19 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Caernarvon TWP Auth, 47.8 ng/L. 10 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
19 community water systems · 276,470 people served · newest sample February 3, 2026
Water systems in Berks County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Reading Area Water Authority | 95,100 | 5.8 ng/L above the 2029 federal MCL | 1 | October 1, 2024 |
| PAW Penn District | 28,508 | 33.1 ng/L above the 2029 federal MCL | 7 | February 13, 2025 |
| PAW Glen Alsace Div | 24,951 | 19.1 ng/L above the 2029 federal MCL | 12 | December 12, 2024 |
| Muhlenberg TWP Muni Auth | 22,400 | 20.8 ng/L above the 2029 federal MCL | 8 | December 20, 2024 |
| Kutztown Borough Water | 14,200 | below the 3 to 4 ng/L reporting limit | 1 | November 12, 2025 |
| Shillington Muni Auth | 13,300 | below the 3 to 4 ng/L reporting limit | 4 | November 20, 2023 |
| Mt Penn Boro Muni Auth | 10,400 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 2 | July 15, 2025 |
| Wyomissing Boro Water System | 8,500 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 1 | February 5, 2024 |
| Boyertown Muni Auth | 8,000 | below the 3 to 4 ng/L reporting limit | 1 | October 22, 2025 |
| Wernersville Muni Water Auth | 7,920 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 7 | December 17, 2024 |
| Maidencreek TWP Water Auth | 7,505 | below the 3 to 4 ng/L reporting limit | 3 | September 24, 2024 |
| Womelsdorf Robesonia Jt Auth | 7,070 | below the 3 to 4 ng/L reporting limit | 3 | November 13, 2023 |
| Birdsboro Muni Water Auth | 5,353 | below the 3 to 4 ng/L reporting limit | 1 | December 8, 2025 |
| Aqua PA Flying Hills WA Sys | 5,100 | 11.2 ng/L above the 2029 federal MCL | 3 | July 16, 2024 |
| Hamburg Muni Water&sewer Auth | 4,990 | below the 3 to 4 ng/L reporting limit | 2 | December 10, 2025 |
| West Reading Boro Water | 4,300 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 1 | November 5, 2025 |
| Caernarvon TWP Auth | 4,245 | 47.8 ng/L above the 2029 federal MCL | 3 | October 20, 2025 |
| Fleetwood Boro Water System | 4,218 | below the 3 to 4 ng/L reporting limit | 3 | August 21, 2023 |
| Lutheran Home at Topton | 410 | below the 3 to 4 ng/L reporting limit | 1 | February 3, 2026 |
| East Penn Mfg CO non-transient non-community water system | 6,170 | monitored under UCMR 5, no page | ||
| Tilden Industrial Park non-transient non-community water system | 4,000 | monitored under UCMR 5, no page | ||
2 systems without a page are not a community water system (schools, workplaces, campgrounds). Nobody's home tap water.
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 Berks 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.