PFAS in tap water, Middlesex County, New Jersey
12 of 15 water systems had PFAS-4 above our 0.5 ng/L benchmark at the latest sample. Highest: Monroe TWP Utility Department, 36.3 ng/L. 14 had PFOA or PFOS above the 4 ng/L federal MCL in at least one sample.
15 community water systems · 718,503 people served · newest sample December 8, 2025
Water systems in Middlesex County
| Water system | People served | PFAS-4 at the latest sample | Entry points | Latest sample |
|---|---|---|---|---|
| Middlesex Water Company | 233,376 | 6.5 ng/L above the 2029 federal MCL | 3 | August 13, 2024 |
| Old Bridge MUA | 68,000 | 6.9 ng/L above the 2029 federal MCL | 4 | February 6, 2024 |
| New Brunswick W Dept | 55,000 | 4.6 ng/L above the 2029 federal MCL | 1 | February 25, 2025 |
| Perth Amboy Water Department | 52,328 | 23.8 ng/L above the 2029 federal MCL | 1 | January 31, 2025 |
| East Brunswick Water Utility | 49,715 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 1 | November 13, 2023 |
| South Brunswick TWP W Di | 45,450 | 23 ng/L above the 2029 federal MCL | 4 | July 16, 2024 |
| Sayreville W Dept | 45,345 | 5.6 ng/L above the 2029 federal MCL | 1 | August 13, 2024 |
| North Brunswick W Dept | 43,905 | below the 3 to 4 ng/L reporting limit | 1 | August 19, 2025 |
| Monroe TWP Utility Department | 36,000 | 36.3 ng/L above the 2029 federal MCL | 6 | September 12, 2024 |
| Edison Water CO | 35,000 | 4.9 ng/L above the 2029 federal MCL | 2 | June 12, 2024 |
| South River W Dept | 16,000 | below the 3 to 4 ng/L reporting limit above the 2029 federal MCL in an earlier sample | 2 | September 16, 2024 |
| Highland Park W Dept | 14,000 | 5.4 ng/L above the 2029 federal MCL | 1 | March 12, 2025 |
| Matawan Borough Water de | 9,084 | 5.4 ng/L above the 2029 federal MCL | 2 | November 19, 2024 |
| Spotswood W Dept | 8,300 | 21.1 ng/L above the 2029 federal MCL | 2 | December 8, 2025 |
| Milltown W Dept | 7,000 | 6.3 ng/L above the 2029 federal MCL | 1 | December 17, 2024 |
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 Middlesex 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.