PFAS in tap water, Sussex County, New Jersey
2 of 7 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Stanhope W Dept, 20.4 ng/L. 3 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
7 community water systems · 51,278 people served · newest sample January 13, 2026
Water systems in Sussex County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Sparta TWP Water Utility - Lake Mohawk | 17,625 | 14.2 ng/L above the 2029 federal MCL | 13 | June 13, 2024 |
| Newton Water & Sewer Utility | 8,300 | below the 3 to 4 ng/L reporting limit | 1 | October 10, 2023 |
| Hopatcong Water Dept | 7,224 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 7 | January 13, 2026 |
| Veolia Water New Jersey Vernon Valley | 5,517 | below the 3 to 4 ng/L reporting limit | 1 | January 16, 2024 |
| Franklin Bd of Public Works | 5,500 | below the 3 to 4 ng/L reporting limit | 1 | September 16, 2024 |
| Stanhope W Dept | 3,730 | 20.4 ng/L above the 2029 federal MCL | 3 | September 18, 2024 |
| Hamburg Board of Public | 3,382 | below the 3 to 4 ng/L reporting limit | 2 | September 17, 2025 |
| Mountain Creek Resort non-transient non-community water system | 5,041 | monitored under UCMR 5, no page | ||
| Gordon Byram Assoc LLC non-transient non-community water system | 4,075 | monitored under UCMR 5, no page | ||
| Walmart non-transient non-community water system | 3,695 | monitored under UCMR 5, no page | ||
| High Point Reg High Scho non-transient non-community water system | 1,750 | monitored under UCMR 5, no page | ||
| Nve Pharmeceutical INC. non-transient non-community water system | 100 | monitored under UCMR 5, no page | ||
5 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 Sussex 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.