New Jersey water quality by county
21 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Atlantic County | 192 | 452,107 | 4 | 6 | |
| Bergen County | 51 | 1,155,145 | 1 | 2 | |
| Burlington County | 292 | 688,066 | 6 | 11 | |
| Camden County | 101 | 556,912 | 3 | 3 | |
| Cape May County | 161 | 537,890 | 4 | 4 | |
| Cumberland County | 128 | 117,415 | 4 | 3 | |
| Essex County | 26 | 895,777 | 4 | 1 | |
| Gloucester County | 180 | 295,570 | 2 | 8 | |
| Hudson County | 7 | 1,228,208 | 0 | 0 | |
| Hunterdon County | 293 | 308,957 | 11 | 18 | |
| Mercer County | 99 | 324,154 | 4 | 5 | |
| Middlesex County | 37 | 724,410 | 4 | 1 | |
| Monmouth County | 288 | 716,046 | 4 | 6 | |
| Morris County | 307 | 679,801 | 13 | 12 | |
| Ocean County | 212 | 1,094,702 | 4 | 2 | |
| Passaic County | 151 | 723,423 | 5 | 9 | |
| Salem County | 105 | 66,827 | 5 | 1 | |
| Somerset County | 93 | 334,539 | 1 | 4 | |
| Sussex County | 475 | 204,399 | 9 | 18 | |
| Union County | 8 | 996,085 | 0 | 3 | |
| Warren County | 220 | 325,760 | 4 | 8 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Jersey records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.