New Jersey
Middlesex County drinking water quality
37 active public water systems serve 724,410 people in Middlesex County. 17 are compliant, 20 had at least one EPA violation in the past three years, 4 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
16 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Middlesex Water Company Woodbridge Twp |
233,376 | 1 | 0 | |
|
Old Bridge Mua Old Bridge Twp |
68,000 | 2 | 1 | |
|
New Brunswick W Dept New Brunswick City |
55,000 | 4 | 0 | |
|
Perth Amboy Water Department Perth Amboy City |
52,328 | 2 | 0 | |
|
East Brunswick Water Utility East Brunswick Twp |
49,715 | 2 | 0 | |
|
South Brunswick Twp W DI Franklin Twp, South Brunswick Twp |
45,450 | 2 | 1 | |
|
Sayreville W Dept Sayreville Boro |
45,345 | 2 | 0 | |
|
North Brunswick W Dept North Brunswick Twp |
43,905 | 1 | 0 | |
|
Monroe Twp Utility Department Monroe Twp |
36,000 | 3 | 0 | |
|
Edison Water CO Edison Twp |
35,000 | 1 | 0 | |
|
South River W Dept South River Boro |
16,000 | 6 | 2 | |
|
Highland Park W Dept Highland Park Boro |
14,000 | 0 | 0 | |
|
Matawan Borough Water de Aberdeen Twp, Marlboro Twp, Matawan Boro and 1 more |
9,084 | 0 | 0 | |
|
Spotswood W Dept Spotswood Boro |
8,300 | 2 | 1 | |
|
Milltown W Dept East Brunswick Twp, Milltown Boro, North Brunswick Twp |
7,000 | 4 | 0 | |
|
Helmetta Water Dept Helmetta Boro |
2,000 | 3 | 0 |
Non-community systems (21: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Valero Gas Station Cranbury Twp |
610 | 0 | 0 | |
|
Monroe Sports Center Monroe Twp |
371 | 0 | 0 | |
|
Bakers American Bar & Grille Monroe Twp |
365 | 0 | 0 | |
|
Springwood Swim Club Woodbridge Twp |
365 | 1 | 0 | |
|
Chinmaya Mission Tri State Center Cranbury Twp |
352 | 0 | 0 | |
|
ST Davids Episcopal Church Cranbury Twp |
303 | 1 | 0 | |
|
Lake Nelson School Piscataway Twp |
300 | 2 | 1 | |
|
ST Stephens Mar Thoma Church South Brunswick Twp |
200 | 1 | 1 | |
|
QR Farrington DC LLC Monroe Twp |
175 | 0 | 0 | |
|
Keystone Plastics INC South Plainfield Boro |
140 | 0 | 0 | |
|
Cranbury Animal Hospital Cranbury Twp |
114 | 1 | 0 | |
|
T&t Coast Auto Group INC Cranbury Twp |
110 | 0 | 0 | |
|
M Hegarty & J Vincent Scalia Funerals Old Bridge Twp |
104 | 0 | 0 | |
|
Make a Wish Monroe Twp |
88 | 0 | 0 | |
|
Floral Park Cemetery South Brunswick Twp |
62 | 1 | 1 | |
|
Valvoline Instant Oil Change Cranbury Twp |
60 | 0 | 0 | |
|
Foley INC Monroe Twp |
47 | 0 | 0 | |
|
Union Hill Gun Club Monroe Twp |
40 | 0 | 0 | |
|
Holland Greenhouse Monroe Twp |
38 | 0 | 0 | |
|
New Jersey Dental Assoc North Brunswick Twp |
33 | 0 | 0 | |
|
Recoil INC Monroe Twp |
30 | 0 | 0 |
Inactive systems (31, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.