TTHM (Total Trihalomethanes) violations in New Jersey
75 active public water systems in New Jersey had a TTHM (Total Trihalomethanes) violation in the past three years, 11 of them in the latest quarter of EPA's data. What TTHM (Total Trihalomethanes) is and why it matters.
Systems with a TTHM (Total Trihalomethanes) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Pemberton Twp High School Old Side Pemberton Twp · Burlington County |
1,580 | 4 | 1 | |
|
NO Warren Reg High Sch Blairstown Twp · Warren County |
1,200 | 2 | 0 | |
|
Mount Arlington Dpw Kadel Sys Mount Arlington Boro · Morris County |
1,053 | 3 | 1 | |
|
Timberlane Middle School Hopewell Twp.1106- · Mercer County |
901 | 7 | 0 | |
|
Stockton Water Department Stockton Boro · Hunterdon County |
650 | 5 | 2 | |
|
AM Best CO Tewksbury Twp · Hunterdon County |
500 | 4 | 1 | |
|
Tilton Terrace MHP Egg Harbor Twp · Atlantic County |
456 | 2 | 0 | |
|
Cape May Mobile Estates Lower Twp · Cape May County |
420 | 3 | 0 | |
|
Newcomb Middle School Pemberton Twp · Burlington County |
412 | 5 | 2 | |
|
Aqua NJ Seaview Harbor Egg Harbor Twp · Atlantic County |
300 | 2 | 1 | |
|
Hillside Estates at Franklin Franklin Boro · Sussex County |
300 | 4 | 1 | |
|
Robbinsville Twp Newtown Village Washington Twp · Mercer County |
300 | 2 | 0 | |
|
Oak Tree Mobile Home Park Jackson Twp · Ocean County |
282 | 3 | 1 | |
|
Fairton Oaks M H Community Fairfield Twp · Cumberland County |
207 | 5 | 1 | |
|
Frelinghuysen Twp Elm SC Frelinghuysen Twp · Warren County |
200 | 1 | 0 | |
|
Kessler Institute for Rehab Chester Twp · Morris County |
200 | 3 | 0 | |
|
NJ Christian Academy Main Bldg Well 2 Upper Freehold Twp · Monmouth County |
140 | 3 | 1 | |
|
Polymer Additives INC Dba Valtris Specia Logan Twp · Gloucester County |
125 | 2 | 0 | |
|
Richards Mobile Home Cou Southampton Twp · Burlington County |
100 | 10 | 0 | |
|
Cedar Springs MHP Well # Middle Twp · Cape May County |
90 | 5 | 3 | |
|
Eagle Point Tank Farm West Deptford Twp · Gloucester County |
90 | 4 | 1 | |
|
D S M Nutritional Products LLC White Twp · Warren County |
80 | 2 | 0 | |
|
Jefferson Industrial Park, LLC Parsippany Troy-hills · Morris County |
80 | 3 | 0 | |
|
Oxford Heritage Manor Oxford Twp · Warren County |
60 | 5 | 0 | |
|
Jersey Central Power & Light Howell Twp · Monmouth County |
56 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved TTHM (Total Trihalomethanes), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not TTHM (Total Trihalomethanes) 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.