Trenton Water Works

PWSID: NJ1111001

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1 active health-based violation
This system currently has unresolved violations for: 5000. These violations mean contaminant levels exceeded EPA limits or required treatment was not performed.

This system has more violations on record than 99% of water systems in New Jersey.

Violation trend: 39.8 per year over the last 5 years, up from 7.6 per year in the previous 5.

System Details

Population Served	217,000
Service Connections	62,403
Water Source	Surface Water
System Type	Community Water System
Owner	Local Government
Status	Active
City	Trenton
EPA ZIP on File	08638

Areas Served

Mercer County

Lead & Copper Testing

Contaminant	Level	EPA Action Level	Status
Lead (90th percentile)	0.0197 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0197 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0176 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0176 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0171 mg/L	0.015 mg/L	Exceeds Action Level
Lead (90th percentile)	0.0148 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0127 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0102 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0100 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0100 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0075 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0072 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0056 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0050 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0042 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0040 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0040 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0035 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0033 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0033 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0022 mg/L	0.015 mg/L	Below Action Level

3 Active Violations

Contaminant	Violation	Date	Health-Based	Status
5000	TT	2020-05-21	Yes	Open
7500	Other	2018-03-03		Open
0400	MR	2002-07-01	Major	Open

Violation History (245 total)

Contaminant	Violation	Date	Health-Based	Status
2950	MCL Measured: 0.0810 MG/L (limit: 0.0800 MG/L)	2024-10-01	Yes	Acknowledged
2950	MCL Measured: 0.0810 MG/L (limit: 0.0800 MG/L)	2024-10-01	Yes	Acknowledged
2950	MCL Measured: 0.0810 MG/L (limit: 0.0800 MG/L)	2024-10-01	Yes	Acknowledged
5000	MR	2024-07-01		Returned to Compliance
5000	MR	2024-07-01		Acknowledged
2456	MR	2023-12-28		Returned to Compliance
8000	MON	2023-11-01		Returned to Compliance
8000	MON	2023-11-01		Returned to Compliance
8000	MON	2023-11-01		Acknowledged
0200	MR	2023-11-01	Major	Acknowledged
0200	MR	2023-11-01	Major	Acknowledged
0200	MR	2023-11-01	Major	Acknowledged
2950	MR	2023-10-01		Acknowledged
2456	MR	2023-10-01		Acknowledged
8000	MON	2023-10-01		Returned to Compliance
8000	MON	2023-10-01		Returned to Compliance
8000	MON	2023-10-01		Acknowledged
0200	MR	2023-10-01	Major	Acknowledged
0200	MR	2023-10-01	Major	Acknowledged
0200	MR	2023-10-01	Major	Acknowledged
0999	MR	2023-10-01		Returned to Compliance
0999	MR	2023-10-01		Acknowledged
0999	MR	2023-10-01		Acknowledged
0999	MR	2023-10-01		Acknowledged
5000	MR	2023-09-29		Returned to Compliance
5000	MR	2023-09-29		Returned to Compliance
8000	MON	2023-09-01		Returned to Compliance
8000	MON	2023-09-01		Acknowledged
8000	MON	2023-09-01		Returned to Compliance
8000	MON	2023-09-01		Acknowledged
0200	MR	2023-09-01	Major	Acknowledged
0200	MR	2023-09-01	Major	Acknowledged
0200	MR	2023-09-01	Major	Acknowledged
0200	MR	2023-09-01	Major	Acknowledged
8000	MON	2023-08-01		Returned to Compliance
8000	MON	2023-08-01		Acknowledged
8000	MON	2023-08-01		Returned to Compliance
8000	MON	2023-08-01		Acknowledged
0200	MR	2023-08-01	Major	Acknowledged
0200	MR	2023-08-01	Major	Acknowledged
0200	MR	2023-08-01	Major	Acknowledged
0200	MR	2023-08-01	Major	Acknowledged
5000	MR	2023-07-01		Returned to Compliance
5000	MR	2023-07-01		Returned to Compliance
5000	MR	2023-07-01		Acknowledged
8000	MON	2023-07-01		Returned to Compliance
8000	MON	2023-07-01		Acknowledged
8000	MON	2023-07-01		Returned to Compliance
8000	MON	2023-07-01		Acknowledged
2950	MR	2023-07-01		Acknowledged

Showing 50 of 242 historical violations.

Understanding This Water System's Record

Trenton Water Works is a community water system water system that draws from surface water sources and serves a population of 217,000 in Trenton, New Jersey. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.

What Do These Violations Mean?

Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.

What Should You Do?

Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.