PFAS in tap water, Orange County, New York
4 of 22 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Monroe Village, 13.8 ng/L. 5 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
22 community water systems · 282,425 people served · newest sample December 30, 2025
Water systems in Orange County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Kiryas Joel | 51,623 | below the 3 to 4 ng/L reporting limit | 5 | December 30, 2025 |
| Middletown City | 30,000 | below the 3 to 4 ng/L reporting limit | 1 | February 10, 2025 |
| Newburgh City | 29,000 | below the 3 to 4 ng/L reporting limit | 1 | January 22, 2024 |
| New Windsor Consolidated WD | 25,667 | below the 3 to 4 ng/L reporting limit | 3 | December 22, 2025 |
| Newburgh Consolidated WD | 22,282 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 2 | April 16, 2025 |
| Wallkill Consolidated WD | 18,450 | below the 3 to 4 ng/L reporting limit | 2 | October 30, 2025 |
| Monroe Village | 12,000 | 13.8 ng/L above the 2029 federal MCL | 2 | October 16, 2023 |
| Woodbury Cons. W.D. | 10,845 | below the 3 to 4 ng/L reporting limit | 3 | May 8, 2024 |
| Cornwall-On-Hudson | 9,700 | below the 3 to 4 ng/L reporting limit | 2 | December 10, 2025 |
| Port Jervis City | 9,000 | below the 3 to 4 ng/L reporting limit | 1 | December 10, 2024 |
| U.s.m.a. - Lusk System | 8,000 | below the 3 to 4 ng/L reporting limit | 1 | October 16, 2024 |
| Washingtonville Village | 7,700 | below the 3 to 4 ng/L reporting limit | 2 | September 19, 2023 |
| Pine Bush Water District | 7,600 | below the 3 to 4 ng/L reporting limit | 3 | February 11, 2025 |
| Walden Village | 7,007 | below the 3 to 4 ng/L reporting limit | 3 | August 16, 2023 |
| Warwick Village | 6,800 | below the 3 to 4 ng/L reporting limit | 2 | December 9, 2025 |
| Goshen Village | 5,600 | below the 3 to 4 ng/L reporting limit | 2 | November 6, 2024 |
| Harriman Village | 5,000 | 6.8 ng/L above the 2029 federal MCL | 2 | July 16, 2025 |
| Montgomery Village | 4,519 | below the 3 to 4 ng/L reporting limit | 3 | November 5, 2024 |
| Highland Falls Village | 4,101 | below the 3 to 4 ng/L reporting limit | 1 | August 13, 2024 |
| U.s.m.a. - Stoney Lonesome Sys | 4,000 | below the 3 to 4 ng/L reporting limit | 1 | December 9, 2025 |
| Chester Village | 3,448 | 4.5 ng/L above the 2029 federal MCL | 2 | December 19, 2023 |
| Arrow Park INC. Cws | 83 | 9.6 ng/L above the 2029 federal MCL | 1 | November 12, 2025 |
| Minisink Valley School Dist. Water Loop non-transient non-community water system | 3,400 | monitored under UCMR 5, no page | ||
| Hamilton Bicentennial Elem. Sc non-transient non-community water system | 386 | 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.
Cities and towns
ZIP codes in Orange 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.