PFAS in tap water, Bucks County, Pennsylvania
16 of 23 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Northampton Bucks CO Mun Auth, 44.2 ng/L. 17 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
23 community water systems · 513,293 people served · newest sample December 10, 2025
Water systems in Bucks County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Lower Bucks CO Joint Mun Auth | 63,007 | below the 3 to 4 ng/L reporting limit | 1 | October 31, 2023 |
| Aqua PA Bensalem | 59,001 | 20.6 ng/L above the 2029 federal MCL | 2 | February 6, 2025 |
| Bcwsa Main Lower South | 52,621 | 14 ng/L above the 2029 federal MCL | 4 | November 5, 2024 |
| Newtown Artesian Water CO | 38,500 | 14.4 ng/L above the 2029 federal MCL | 4 | October 10, 2024 |
| Northampton Bucks CO Mun Auth | 36,750 | 44.2 ng/L above the 2029 federal MCL | 16 | September 3, 2025 |
| Warminster Municipal Authority | 36,000 | below the 3 to 4 ng/L reporting limit | 3 | February 7, 2024 |
| PA American Water CO Yardley | 33,171 | 15.8 ng/L above the 2029 federal MCL | 3 | October 1, 2024 |
| Aqua PA Bristol | 28,727 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 1 | December 5, 2024 |
| Falls TWP Water & Sewer Dept | 24,400 | below the 3 to 4 ng/L reporting limit | 1 | August 22, 2024 |
| Nwwa Warrington Township | 21,588 | below the 3 to 4 ng/L reporting limit | 13 | November 20, 2025 |
| Upper Southampton Mun Auth | 16,000 | 35.3 ng/L above the 2029 federal MCL | 3 | October 8, 2024 |
| Perkasie Regional Authority | 15,000 | 27.2 ng/L above the 2029 federal MCL | 4 | July 16, 2024 |
| Warwick TWP Water & Sewer Auth | 14,699 | 18.6 ng/L above the 2029 federal MCL | 2 | August 4, 2025 |
| Morrisville Munic Authority | 13,342 | below the 3 to 4 ng/L reporting limit | 1 | December 10, 2025 |
| Quakertown Boro | 12,800 | 40.7 ng/L above the 2029 federal MCL | 8 | September 4, 2025 |
| Doylestown Boro Water Dept | 8,700 | 33.8 ng/L above the 2029 federal MCL | 5 | October 28, 2025 |
| Dtma Main System | 8,655 | 27.3 ng/L above the 2029 federal MCL | 8 | October 21, 2025 |
| Richland TWP Water Authority | 6,800 | 18.6 ng/L above the 2029 federal MCL | 3 | October 21, 2025 |
| Aqua PA Chalfont | 5,900 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 3 | January 13, 2025 |
| Hilltown TWP Water&sewer Auth | 5,770 | 14.8 ng/L above the 2029 federal MCL | 4 | December 9, 2025 |
| Buckingham TWP Cold Spring | 4,760 | 41.3 ng/L above the 2029 federal MCL | 2 | July 22, 2025 |
| Milford TWP Water Authority | 4,497 | 3.1 ng/L | 3 | July 14, 2025 |
| Plumstead Northern System | 2,605 | 14.9 ng/L above the 2029 federal MCL | 4 | July 22, 2025 |
| Bucks County Community College non-transient non-community water system | 8,000 | monitored under UCMR 5, no page | ||
| Finale Partners non-transient non-community water system | 150 | 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 Bucks 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.