Monmouth County tap water
10 of 21 water systems serving Monmouth County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 38 community water systems list this county as served; 19 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 |
|---|---|---|---|---|
| NJ American Water - Coastal North | Surface water | 377,613 | Yes | 0 |
| Gordons Corner Water CO | Purchased surface water | 46,196 | Yes | 0 |
| Freehold Twp Water dept | Purchased surface water | 29,831 | Yes | 0 |
| Marlboro Township Water Utility Division | Purchased surface water | 29,480 | No | 0 |
| Wall Twp Water dept | Purchased surface water | 26,000 | Yes | 0 |
| Belmar Water dept | Purchased surface water | 20,000 | No | 1 |
| Manasquan Water Departme | Groundwater | 14,000 | No | 1 |
| Red Bank Water dept | Purchased surface water | 12,520 | Yes | 0 |
| Spring Lake Water department | Purchased surface water | 11,270 | No | 0 |
| Freehold Borough Water D | Groundwater | 11,029 | No | 1 |
| Keansburg Water & Sewer dept. | Purchased surface water | 10,105 | Yes | 0 |
| Matawan Borough Water De | Purchased surface water | 9,084 | Yes | 1 |
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.