Hamilton, NJ Tap Water Quality 2026

Water quality report for Hamilton, NJ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Hamilton's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Trenton Water Works PWSID: NJ1111001 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 6.00 ppb, 40% of the action level and no violations are open. No PFAS was detected.

Hamilton earns a B for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 6.00 ppb — 40% of the federal action level

PFAS tested, none detected

124 violations since 2015, 20 health-based

No violations currently open

Hamilton's lead level vs. all New Jersey community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 6.00 ppb — 40% of the federal action level

✓ Lower lead than 16% of New Jersey utilities

Population Served

67425

~62403 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

124 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

40% of EPA action level

6.00 ppb

Action level: 15 ppb

The 90th-percentile lead result is 6.00 ppb, 40% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
TTHM	MCL EXCEEDANCE	0.081 MG/L	0.080 mg/L	2024	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2024	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Archived
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Archived
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Archived
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Archived
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Archived
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Archived
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Resolved
Nitrate	MONITORING AND REPORTING	—	10 mg/L	2023	Resolved
1,2,4-Trichlorobenzene	MONITORING AND REPORTING	—	0.07 mg/L	2023	Resolved
cis-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.07 mg/L	2023	Resolved
Xylenes, Total	MONITORING AND REPORTING	—	10 mg/L	2023	Resolved
DICHLOROMETHANE	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
o-Dichlorobenzene	MONITORING AND REPORTING	—	0.6 mg/L	2023	Resolved
p-Dichlorobenzene	MONITORING AND REPORTING	—	0.075 mg/L	2023	Resolved
Vinyl chloride	MONITORING AND REPORTING	—	0.002 mg/L	2023	Resolved
1,1-Dichloroethylene	MONITORING AND REPORTING	—	0.007 mg/L	2023	Resolved
trans-1,2-Dichloroethylene	MONITORING AND REPORTING	—	0.1 mg/L	2023	Resolved
1,2-Dichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
1,1,1-Trichloroethane	MONITORING AND REPORTING	—	0.2 mg/L	2023	Resolved
Carbon tetrachloride	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
1,2-Dichloropropane	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
Trichloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
1,1,2-Trichloroethane	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
Tetrachloroethylene	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
CHLOROBENZENE	MONITORING AND REPORTING	—	0.1 mg/L	2023	Resolved
Benzene	MONITORING AND REPORTING	—	0.005 mg/L	2023	Resolved
Toluene	MONITORING AND REPORTING	—	1 mg/L	2023	Resolved
Ethylbenzene	MONITORING AND REPORTING	—	0.7 mg/L	2023	Resolved
Styrene	MONITORING AND REPORTING	—	0.1 mg/L	2023	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Archived
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Archived
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2023	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2022	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2022	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2022	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2022	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2022	Archived
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2022	Archived
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2022	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2022	Archived
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2022	Resolved
Public Notice	OTHER	—	—	2021	Resolved
Consumer Confidence Rule	OTHER	—	—	2021	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2021	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2021	Archived
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2021	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2021	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2021	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2021	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2021	Resolved
Fluoride	MONITORING AND REPORTING	—	4.0 mg/L	2021	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2020	Resolved
ETHYLENE DIBROMIDE	MONITORING AND REPORTING	—	0.00005 mg/L	2020	Resolved
1,2-DIBROMO-3-CHLOROPROPANE	MONITORING AND REPORTING	—	0.0002 mg/L	2020	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2020	Addressed
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2019	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2019	Resolved
TTHM	MCL EXCEEDANCE	0.088 MG/L	0.080 mg/L	2018	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2018	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2018	Resolved
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.063 MG/L	0.060 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.067 MG/L	0.060 mg/L	2018	Resolved
Public Notice	OTHER	—	—	2018	Addressed
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2018	Resolved
TTHM	MCL EXCEEDANCE	0.081 MG/L	0.080 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.071 MG/L	0.060 mg/L	2018	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2017	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2017	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2017	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.062 MG/L	0.060 mg/L	2017	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2017	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2017	Resolved
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2017	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2017	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2017	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2016	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2016	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2016	Resolved
Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2016	Resolved

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

124 violations are on record since 2015, of which 20 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Trenton Water Works

PWSID NJ1111001

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 67,425

Service connections 62,403

Systems serving this area 4

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Hamilton tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 6.00 ppb, 40% of the action level.

Does Hamilton water have PFAS? ▼

It was tested for the six regulated PFAS compounds and none were detected.

Who supplies water to Hamilton? ▼

Trenton Water Works (PWSID NJ1111001), one of 4 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2022-04-05. No significant deficiencies were recorded.

What Should Hamilton Residents Do?

Consider a filter certified for lead

Look for NSF/ANSI 53 certification for lead reduction.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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