Middlesex County tap water
9 of 15 water systems serving Middlesex County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 16 community water systems list this county as served; 15 serve 3,300+ people with full PFAS testing.
- 8 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Middlesex Water Company | Surface water | 233,376 | No | 0 |
| Old Bridge Mua | Purchased surface water | 68,000 | No | 0 |
| New Brunswick W dept | Surface water | 55,000 | Yes | 1 |
| Perth Amboy Water department | Purchased surface water | 52,328 | Yes | 3 |
| East Brunswick Water Utility | Purchased surface water | 49,715 | No | 1 |
| South Brunswick Twp W Di | Purchased surface water | 45,450 | Yes | 1 |
| Sayreville W dept | Groundwater under surface influence | 45,345 | Yes | 0 |
| North Brunswick W dept | Surface water | 43,905 | No | 0 |
| Monroe Twp Utility department | Groundwater | 36,000 | Yes | 0 |
| Edison Water CO | Purchased surface water | 35,000 | No | 1 |
| South River W dept | Purchased surface water | 16,000 | Yes | 4 |
| Highland Park W dept | Purchased surface water | 14,000 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.