COUNTY WATER-SYSTEM LEDGER
Mercer, New Jersey
EPA’s September 2026 export lists 6 active community water systems serving Mercer, New Jersey, with 4 current-violation flags and 1 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Mercer, New Jersey
EPA associates 6 covered systems with Mercer, New Jersey; their reported population-served values total 297,783 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Trenton Water WorksNJ1111001 | 217,000 | Surface water | Current serious-violator flag |
| Aqua Nj - Hamilton SquareNJ1103001 | 39,128 | Surface water purchased | Current monitoring/reporting flag |
| East Windsor MuaNJ1101002 | 25,000 | Ground water | No current violation flagged |
| Aqua Nj - LawrenceNJ1107002 | 8,655 | Groundwater under influence of surface water | Current monitoring/reporting flag |
| Hightstown Water DepartmentNJ1104001 | 5,400 | Ground water | No current violation flagged |
| Pennington W DeptNJ1108001 | 2,600 | Ground water | Current monitoring/reporting flag |
02 / SOURCE MIX
Primary water sources for Mercer, New Jersey
EPA classifies 6 systems serving Mercer, New Jersey across 4 primary-source categories; Surface water is the largest category with 1 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.