Water quality by county
in New Jersey
EPA sampled public water systems across New Jersey for PFAS under its UCMR 5 programme. Of the 21 counties, 20 have a reading above a federal limit and 0 have not been sampled at all — which is not a clean result, only an absence of one. Each county below shows what was found, at what concentration, and at which utility.
| county | Population | Worst result | Compound |
|---|---|---|---|
| Essex County | 881,527 | 11× | PFOA · 44 ng/L |
| Mercer County | 392,138 | 9.5× | PFOS · 38.1 ng/L |
| Bergen County | 978,641 | 7.8× | PFOA · 31.4 ng/L |
| Gloucester County | 311,783 | 7.3× | PFNA · 73.3 ng/L |
| Middlesex County | 890,119 | 5.8× | PFOA · 23 ng/L |
| Somerset County | 357,467 | 5.8× | PFOA · 23 ng/L |
| Salem County | 65,874 | 4.8× | PFOA · 19 ng/L |
| Burlington County | 475,515 | 4.6× | PFOA · 18.5 ng/L |
| Passaic County | 526,597 | 3.7× | PFOA · 14.8 ng/L |
| Morris County | 523,053 | 3.5× | PFOA · 14.2 ng/L |
| Hudson County | 736,185 | 3.5× | PFOA · 14 ng/L |
| Camden County | 533,988 | 3.2× | PFOS · 12.9 ng/L |
| Hunterdon County | 131,708 | 3.0× | PFOS · 12.2 ng/L |
| Sussex County | 147,444 | 3.0× | PFOA · 12.2 ng/L |
| Ocean County | 666,434 | 2.9× | PFOA · 11.5 ng/L |
| Atlantic County | 279,114 | 2.7× | PFOA · 10.9 ng/L |
| Cumberland County | 155,678 | 2.7× | PFOS · 10.8 ng/L |
| Union County | 594,160 | 2.3× | PFOA · 9.1 ng/L |
| Warren County | 112,031 | 2.3× | PFOA · 9.1 ng/L |
| Monmouth County | 647,520 | 2.1× | PFOA · 8.3 ng/L |
| Cape May County | 93,875 | under the limit | — |