Water quality in Princeton, New Jersey
Princeton is in Mercer County. 99 active public water systems serve the county; 69 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Mercer County
10 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Hopewell Boro W Dept Hopewell Boro |
2,035 | 4 | 5.5 mi | |
| Aqua NJ Lawrence Lawrence Twp |
8,655 | 3 | 5.7 mi | |
| Pennington W Dept Pennington Boro |
2,600 | 3 | 6.9 mi | |
| Trenton Water Works Ewing Twp, Hamilton Twp, Hopewell Twp.1106- and 2 more |
217,000 | 8 | 9.0 mi | |
| East Windsor Mua East Windsor Twp |
25,000 | 2 | 9.1 mi | |
| Hightstown Water Department Hightstown Boro |
5,400 | 0 | 9.8 mi | |
| Washington Crossing Park Estates Hopewell Twp.1106- |
356 | 4 | 9.8 mi | |
| Aqua NJ Hamilton Square Hamilton Twp |
39,128 | 4 | 10.4 mi | |
| Mercer County Correctional Center Hopewell Twp.1106- |
860 | 5 | 13.4 mi | |
| Robbinsville Twp Newtown Village Washington Twp |
300 | 2 | 32.3 mi |
Non-community systems in Mercer County (88: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Apple Montessori School Lawrence Twp |
35 | 3 | 1 | |
|
Terhune Orchards Lawrence Twp |
1,025 | 1 | 0 | |
|
Princeton Child Developmnt Ins Lawrence Twp |
110 | 1 | 0 | |
|
Princeton Technology Ctr Hopewell Twp.1106- |
80 | 1 | 1 | |
|
Rosedale Park Pump House 1 Hopewell Twp.1106- |
52 | 2 | 1 | |
|
The Watershed Institute Hopewell Twp.1106- |
26 | 2 | 1 | |
|
Music & Movement Center Hopewell Twp.1106- |
65 | 0 | 0 | |
|
Word Christian Fellowship Int Hopewell Twp.1106- |
91 | 0 | 0 | |
|
The Watershed Institute Hopewell Twp.1106- |
152 | 3 | 0 | |
|
Hopewell Tennis and Swim Hopewell Twp.1106- |
75 | 1 | 1 | |
|
Zydus Pharmaceuticals Hopewell Twp.1106- |
65 | 3 | 0 | |
|
Pennington Office Park-A Hopewell Twp.1106- |
31 | 1 | 1 | |
|
Pennington Leasing LLC Pennington Boro |
44 | 1 | 1 | |
|
Shiva 1722 LLC Hopewell Twp.1106- |
26 | 2 | 1 | |
|
84 Hopewell LLC Hopewell Twp.1106- |
66 | 1 | 0 | |
|
Stacys Cream King Pennington Boro |
400 | 3 | 2 | |
|
Offices at Pennington Point Hopewell Twp.1106- |
125 | 0 | 0 | |
|
International Process Plants West Windsor Twp |
51 | 2 | 0 | |
|
Corner Stone Court Hopewell Twp.1106- |
940 | 1 | 0 | |
|
The Pennington School Pennington Boro |
565 | 1 | 0 | |
|
The Village Learning Center Hopewell Twp.1106- |
100 | 1 | 0 | |
|
Wildflowers Hopewell Twp.1106- |
362 | 1 | 1 | |
|
Tree Farm Village Hopewell Twp.1106- |
230 | 1 | 0 | |
|
Wilson & Apple Funeral Home Hopewell Twp.1106- |
32 | 0 | 0 | |
|
Marcos Pizza Hopewell Twp.1106- |
104 | 2 | 1 | |
|
Lukoil Station #57703 Hopewell Twp.1106- |
55 | 2 | 2 | |
|
Pennington Cleaners Hopewell Twp.1106- |
215 | 1 | 1 | |
|
Pennington Family Chiropractic PC Hopewell Twp.1106- |
44 | 2 | 1 | |
|
Pennington Montessori School Hopewell Twp.1106- |
133 | 1 | 0 | |
|
Princeton Windsor Office East Windsor Twp |
85 | 1 | 1 | |
|
Greater Princeton Investments LLC Hopewell Twp.1106- |
25 | 1 | 0 | |
|
Mercer Professional Center @ Penn Hopewell Twp.1106- |
100 | 0 | 0 | |
|
Pennington Shop-Rite Hopewell Twp.1106- |
3,663 | 1 | 0 | |
|
Hillbilly Hall, Inc. Hopewell Twp.1106- |
104 | 2 | 1 | |
|
Practice Square Offices East Windsor Twp |
72 | 1 | 0 | |
|
Linluks LLC Hopewell Twp.1106- |
32 | 0 | 0 | |
|
East Windsor Deli East Windsor Twp |
45 | 0 | 0 | |
|
Camelot Nursery School Hopewell Twp.1106- |
69 | 0 | 0 | |
|
Eden Autism Clayton Center West Windsor Twp |
60 | 8 | 2 | |
|
Goddard School West Windsor West Windsor Twp |
155 | 0 | 0 | |
|
Bcj&r Hopewell Twp.1106- |
29 | 1 | 1 | |
|
Pennington Citgo #12261011 Hopewell Twp.1106- |
35 | 0 | 0 | |
|
Hopewell Valley Vineyards LLC Pennington Boro |
71 | 1 | 0 | |
|
Timberlane Middle School Hopewell Twp.1106- |
901 | 7 | 0 | |
|
Princeton RD Professiona East Windsor Twp |
165 | 0 | 0 | |
|
Hopwell Valley Medical Center Hopewell Twp.1106- |
65 | 2 | 1 | |
|
Little League of Hopewell Twp Hopewell Twp.1106- |
200 | 2 | 0 | |
|
Hopewell Township Municipal GA Hopewell Twp.1106- |
45 | 1 | 1 | |
|
H&h Appliance Center East Windsor Twp |
30 | 0 | 0 | |
|
Saint Peter Lutheran Church Hopewell Twp.1106- |
125 | 1 | 1 |
About this data
Water systems are matched to Mercer County, nearest to Princeton first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files or the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.