E. coli (Escherichia coli) violations in New Jersey
154 active public water systems in New Jersey had a E. coli (Escherichia coli) violation in the past three years, 146 of them still unresolved. What E. coli (Escherichia coli) is and why it matters.
Health effects: Most E. coli strains cause diarrheal illness. Some strains (e.g., O157:H7) produce toxins causing severe bloody diarrhea, hemolytic uremic syndrome (HUS — a form of kidney failure), and death — especially in children under 5 and the elderly. Even non-pathogenic strains in drinking water indicate that disease-causing organisms may also be present.
Systems with a E. coli (Escherichia coli) violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
East Orange Water Commission East Orange City · Essex County |
75,000 | 6 | 1 | |
|
Old Bridge Mua Old Bridge Twp · Middlesex County |
68,000 | 2 | 1 | |
|
Ridgewood Water Ridgewood Twp · Bergen County |
61,700 | 6 | 2 | |
|
Aqua NJ Blackwood Gloucester Twp · Camden County |
44,396 | 2 | 1 | |
|
Aqua NJ Hamilton Square Hamilton Twp · Mercer County |
39,128 | 4 | 2 | |
|
Vineland Water & Sewer Utility Vineland City · Cumberland County |
36,250 | 9 | 2 | |
|
Orange Water Dept Orange City · Essex County |
30,134 | 6 | 2 | |
|
Millville Water Department Millville City · Cumberland County |
27,500 | 4 | 1 | |
|
Bridgeton City Water Dept Bridgeton City · Cumberland County |
22,770 | 5 | 1 | |
|
Hamilton Township Mua Hamilton Twp, Weymouth Twp · Atlantic County |
21,720 | 2 | 1 | |
|
Moorestown Water Dept Moorestown Twp · Burlington County |
20,700 | 5 | 1 | |
|
Maple Shade Water Department Maple Shade Twp · Burlington County |
19,400 | 2 | 1 | |
|
Park Ridge Water Dept Hillsdale Boro, Montvale Boro, Park Ridge Boro and 2 more · Bergen County |
16,466 | 2 | 1 | |
|
Bordentown Water Departm Bordentown City, Bordentown Twp, Fieldsboro Boro · Burlington County |
15,821 | 3 | 1 | |
|
Madison Water Dept Madison Boro · Morris County |
15,820 | 3 | 1 | |
|
Pequannock Twp Water Department Lincoln Park Boro, Pequannock Twp · Morris County |
14,010 | 4 | 2 | |
|
Rockaway Twp Water Dept Rockaway Twp · Morris County |
14,000 | 5 | 1 | |
|
Verona Water Department Verona Boro · Essex County |
13,641 | 7 | 2 | |
|
Clinton Water Dept Clinton Town · Hunterdon County |
12,500 | 2 | 1 | |
|
Keansburg Water & Sewer Dept. Keansburg Boro · Monmouth County |
10,105 | 5 | 2 | |
|
Ringwood Water Department Ringwood Boro · Passaic County |
9,327 | 6 | 3 | |
|
Florham Park Water Dept Florham Park Boro · Morris County |
8,846 | 3 | 1 | |
|
Spotswood W Dept Spotswood Boro · Middlesex County |
8,300 | 2 | 1 | |
|
Mount Olive Twp W D Main Mount Olive Twp · Morris County |
7,887 | 7 | 2 | |
|
Hopatcong Water Dept Hopatcong Boro · Sussex County |
7,224 | 4 | 2 | |
|
Resorts Atlantic City Atlantic City · Atlantic County |
5,500 | 3 | 1 | |
|
Allamuchy Twp Water & Sewer Allamuchy Twp · Warren County |
5,423 | 5 | 2 | |
|
Roxbury Twp W Dept-Sky V Roxbury Twp · Morris County |
4,478 | 2 | 2 | |
|
MT Olive Village Green Water System Mount Olive Twp · Morris County |
3,600 | 6 | 3 | |
|
High Bridge W Dept High Bridge Boro · Hunterdon County |
3,300 | 5 | 2 | |
|
Wawa #909 Millstone Twp · Monmouth County |
2,995 | 2 | 2 | |
|
Pennington W Dept Pennington Boro · Mercer County |
2,600 | 3 | 2 | |
|
NJ American Water Homestead Mansfield Twp · Burlington County |
2,420 | 1 | 1 | |
|
Delsea Regional High Sch Franklin Twp · Gloucester County |
1,254 | 1 | 1 | |
|
Lake Lenape Water CO Andover Twp · Sussex County |
1,250 | 7 | 1 | |
|
Travel Centers of America Knowlton Twp · Warren County |
1,070 | 2 | 0 | |
|
Manasquan Reservoir Visitor Center Howell Twp · Monmouth County |
1,008 | 2 | 2 | |
|
Lodestar Park Fredon Twp · Sussex County |
1,000 | 1 | 1 | |
|
Fountain of Life Center Florence Twp · Burlington County |
920 | 2 | 2 | |
|
Mercer County Correctional Center Hopewell Twp.1106- · Mercer County |
860 | 5 | 1 | |
|
Dunkin Donuts West Milford Twp · Passaic County |
811 | 1 | 1 | |
|
Wallkill Valley High School Hardyston Twp · Sussex County |
710 | 3 | 1 | |
|
Church of St. William the Abbot Howell Twp · Monmouth County |
650 | 4 | 2 | |
|
Fredon Plaza Fredon Twp · Sussex County |
620 | 3 | 1 | |
|
Spring Lake Day Camp Ringwood Boro · Passaic County |
608 | 2 | 2 | |
|
Copper Hill School Raritan Twp · Hunterdon County |
550 | 3 | 2 | |
|
Upper Twp Middle School Upper Twp · Cape May County |
525 | 4 | 2 | |
|
The Cabin Howell Twp · Monmouth County |
521 | 2 | 1 | |
|
Harmony Ridge Campground Frankford Twp · Sussex County |
509 | 2 | 1 | |
|
7-11 New Hanover Twp · Burlington County |
504 | 3 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) alone.
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.