Water quality in Hamilton Square, New Jersey
Hamilton Square 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
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Mercer County
10 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Trenton Water Works Ewing Twp, Hamilton Twp, Hopewell Twp.1106- and 2 more |
217,000 | 8 | 5.4 mi | |
| Lawrenceville School Lawrence Twp |
1,200 | 2 | 6.3 mi | |
| East Windsor Mua East Windsor Twp |
25,000 | 2 | 6.6 mi | |
| Aqua NJ Lawrence Lawrence Twp |
8,655 | 3 | 6.9 mi | |
| Hightstown Water Department Hightstown Boro |
5,400 | 0 | 7.2 mi | |
| Pennington W Dept Pennington Boro |
2,600 | 3 | 10.2 mi | |
| Washington Crossing Park Estates Hopewell Twp.1106- |
356 | 4 | 11.8 mi | |
| Hopewell Boro W Dept Hopewell Boro |
2,035 | 4 | 12.8 mi | |
| Mercer County Correctional Center Hopewell Twp.1106- |
860 | 5 | 15.9 mi | |
| Robbinsville Twp Newtown Village Washington Twp |
300 | 2 | 40.8 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 |
|---|---|---|---|---|
|
Bent Iron Brewery Hamilton Twp |
1,201 | 1 | 1 | |
|
Goddard School West Windsor West Windsor Twp |
155 | 0 | 0 | |
|
H&h Appliance Center East Windsor Twp |
30 | 0 | 0 | |
|
Hamilton YMCA at Sawmill Road Hamilton Twp |
498 | 0 | 0 | |
|
Eden Autism Clayton Center West Windsor Twp |
60 | 8 | 2 | |
|
International Process Plants West Windsor Twp |
51 | 2 | 0 | |
|
East Windsor Deli East Windsor Twp |
45 | 0 | 0 | |
|
Princeton Windsor Office East Windsor Twp |
85 | 1 | 1 | |
|
Practice Square Offices East Windsor Twp |
72 | 1 | 0 | |
|
Princeton RD Professiona East Windsor Twp |
165 | 0 | 0 | |
|
Alliance Homes East Windsor Twp |
40 | 0 | 0 | |
|
American Legion Post 148 East Windsor Twp |
26 | 1 | 1 | |
|
Kyle Family Farm East Windsor Twp |
54 | 1 | 1 | |
|
2nd Pentecostal Church East Windsor Twp |
55 | 0 | 0 | |
|
Apple Montessori School Lawrence Twp |
35 | 3 | 1 | |
|
Jewish Community Center East Windsor Twp |
55 | 0 | 0 | |
|
NJ Credit Union League East Windsor Twp |
55 | 0 | 0 | |
|
Ibew #827 East Windsor Twp |
35 | 0 | 0 | |
|
Camelot Nursery School Hopewell Twp.1106- |
69 | 0 | 0 | |
|
Etra Lake Park East Windsor Twp |
50 | 1 | 1 | |
|
Terhune Orchards Lawrence Twp |
1,025 | 1 | 0 | |
|
Princeton Child Developmnt Ins Lawrence Twp |
110 | 1 | 0 | |
|
Mercer Professional Center @ Penn Hopewell Twp.1106- |
100 | 0 | 0 | |
|
Greater Princeton Investments LLC Hopewell Twp.1106- |
25 | 1 | 0 | |
|
Bcj&r Hopewell Twp.1106- |
29 | 1 | 1 | |
|
Pennington Family Chiropractic PC Hopewell Twp.1106- |
44 | 2 | 1 | |
|
Pennington Shop-Rite Hopewell Twp.1106- |
3,663 | 1 | 0 | |
|
Lukoil Station #57703 Hopewell Twp.1106- |
55 | 2 | 2 | |
|
Wilson & Apple Funeral Home Hopewell Twp.1106- |
32 | 0 | 0 | |
|
Pennington Cleaners Hopewell Twp.1106- |
215 | 1 | 1 | |
|
Wildflowers Hopewell Twp.1106- |
362 | 1 | 1 | |
|
Marcos Pizza Hopewell Twp.1106- |
104 | 2 | 1 | |
|
Rosedale Park Pump House 1 Hopewell Twp.1106- |
52 | 2 | 1 | |
|
Pennington Citgo #12261011 Hopewell Twp.1106- |
35 | 0 | 0 | |
|
Revere Restaurant Ewing Twp |
100 | 0 | 0 | |
|
Hopwell Valley Medical Center Hopewell Twp.1106- |
65 | 2 | 1 | |
|
Pennington Leasing LLC Pennington Boro |
44 | 1 | 1 | |
|
Linluks LLC Hopewell Twp.1106- |
32 | 0 | 0 | |
|
The Pennington School Pennington Boro |
565 | 1 | 0 | |
|
Little League of Hopewell Twp Hopewell Twp.1106- |
200 | 2 | 0 | |
|
Hopewell Township Municipal GA Hopewell Twp.1106- |
45 | 1 | 1 | |
|
Princeton Technology Ctr Hopewell Twp.1106- |
80 | 1 | 1 | |
|
Tree Farm Village Hopewell Twp.1106- |
230 | 1 | 0 | |
|
Offices at Pennington Point Hopewell Twp.1106- |
125 | 0 | 0 | |
|
Corner Stone Court Hopewell Twp.1106- |
940 | 1 | 0 | |
|
Timberlane Middle School Hopewell Twp.1106- |
901 | 7 | 0 | |
|
Pennington Montessori School Hopewell Twp.1106- |
133 | 1 | 0 | |
|
Stacys Cream King Pennington Boro |
400 | 3 | 2 | |
|
Zydus Pharmaceuticals Hopewell Twp.1106- |
65 | 3 | 0 | |
|
The Watershed Institute Hopewell Twp.1106- |
26 | 2 | 1 |
About this data
Water systems are matched to Mercer County, nearest to Hamilton Square 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.