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AQUA NJ - HAMILTON SQUARE

PWS ID: NJ1103001 · HAMILTON, New Jersey 08691

AQUA NJ - HAMILTON SQUARE serves 39,128 people in HAMILTON, New Jersey using Surface Water water sources. It has 84 recorded EPA violations, including 3 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (7 compounds found).

Water Quality Snapshot: AQUA NJ - HAMILTON SQUARE

AQUA NJ - HAMILTON SQUARE is a private-owned community water system that delivers drinking water to 39,128 residents in HAMILTON, New Jersey (Mercer County) through 12,738 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 84 total violations for this system , of which 3 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 77 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 14 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 7 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 27.5 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across New Jersey, EPA tracks 3,428 public water systems serving 9,570,926 people, with 204,988 cumulative violations and 22,229 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 59.8 violations. AQUA NJ - HAMILTON SQUARE's 84 violations sit above the New Jersey average. Statewide, 208 of 264 UCMR5-tested systems have reported PFAS detections (78.8%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
39,128
Total Violations
84
Health-Based Violations
3
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
12,738
County
Mercer
School/Daycare
No
MCL Violations
3
Monitoring Violations
77
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 14 2024
Combined Uranium MR 7 2024
Combined Radium (-226 and -228) MR 7 2024
Gross Alpha, Excl. Radon and U MR 7 2024
Coliform (TCR) MR 6 2012
Radium-226 MR 5 2024
Radium-228 MR 5 2024
Nitrate MR 3 2023
Combined Radium (-226 and -228) MCL 2 2006
E. COLI MR 2 2023
Revised Total Coliform Rule RPT 2 2019
Coliform (TCR) MCL 1 2004
1,2,4-Trichlorobenzene MR 1 2004
cis-1,2-Dichloroethylene MR 1 2004
Xylenes, Total MR 1 2004
o-Dichlorobenzene MR 1 2004
Vinyl chloride MR 1 2004
1,1-Dichloroethylene MR 1 2004
1,2-Dichloroethane MR 1 2004
1,1,1-Trichloroethane MR 1 2004
Carbon tetrachloride MR 1 2004
1,2-Dichloropropane MR 1 2004
Trichloroethylene MR 1 2004
CHLOROBENZENE MR 1 2004
Benzene MR 1 2004
Toluene MR 1 2004
Ethylbenzene MR 1 2004
Styrene MR 1 2004
trans-1,2-Dichloroethylene MR 1 2004
1,1,2-Trichloroethane MR 1 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 33 of 270 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 9/3/2025 0.0064 µg/L 0.004 µg/L Detected
PFBS 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/3/2025 0.0045 µg/L 0.003 µg/L Detected
PFMBA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/3/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFDA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 9/3/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 9/3/2025 0.0034 µg/L 0.003 µg/L Detected
PFHxS 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/3/2025 0.0116 µg/L 0.004 µg/L Detected
PFDoA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/3/2025 0.0045 µg/L 0.003 µg/L Detected
PFUnA 9/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 9/3/2025 <9 µg/L 9 µg/L Not Detected
PFTA 9/3/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/3/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 9/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 9/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 9/3/2025 0.0054 µg/L 0.003 µg/L Detected
PFDA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/3/2025 0.0100 µg/L 0.003 µg/L Detected
PFOS 9/3/2025 0.0113 µg/L 0.004 µg/L Detected
PFBS 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/3/2025 <0.02 µg/L 0.02 µg/L Not Detected
lithium 9/3/2025 <9 µg/L 9 µg/L Not Detected
PFHpA 9/3/2025 0.0034 µg/L 0.003 µg/L Detected
PFEESA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 9/3/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/3/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFDoA 9/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/3/2025 <0.004 µg/L 0.004 µg/L Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for AQUA NJ - HAMILTON SQUARE.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NJ1103001 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New Jersey Drinking Water Authority

NJ DEP — Bureau of Safe Drinking Water is the primacy agency that licenses and inspects AQUA NJ - HAMILTON SQUARE under EPA-delegated authority.

Open NJ regulator portal

Source: NJ DEP — Bureau of Safe Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Lead and Copper Rule MR 14 SDWIS / NJ1103001 / 5000
2024 Combined Uranium MR 7 SDWIS / NJ1103001 / 4006
2024 Combined Radium (-226 and -228) MR 7 SDWIS / NJ1103001 / 4010
2024 Gross Alpha, Excl. Radon and U MR 7 SDWIS / NJ1103001 / 4000
2024 Radium-226 MR 5 SDWIS / NJ1103001 / 4020
2024 Radium-228 MR 5 SDWIS / NJ1103001 / 4030
2023 Nitrate MR 3 SDWIS / NJ1103001 / 1040
2023 E. COLI MR 2 SDWIS / NJ1103001 / 3014
2019 Revised Total Coliform Rule RPT 2 SDWIS / NJ1103001 / 8000
2012 Coliform (TCR) MR 6 SDWIS / NJ1103001 / 3100
2006 Combined Radium (-226 and -228) MCL 2 SDWIS / NJ1103001 / 4010
2004 Coliform (TCR) MCL 1 SDWIS / NJ1103001 / 3100
2004 1,2,4-Trichlorobenzene MR 1 SDWIS / NJ1103001 / 2378
2004 cis-1,2-Dichloroethylene MR 1 SDWIS / NJ1103001 / 2380
2004 Xylenes, Total MR 1 SDWIS / NJ1103001 / 2955

How AQUA NJ - HAMILTON SQUARE Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric AQUA NJ - HAMILTON SQUARE New Jersey avg Federal benchmark
Total violations 84 59.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 6.5 Indicates a contaminant exceeded a federal MCL
PFAS detection 7 compounds 78.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 39,128 2,792 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 3,428 regulated public water systems in New Jersey.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is AQUA NJ - HAMILTON SQUARE water safe to drink? ▼
AQUA NJ - HAMILTON SQUARE (PWS ID: NJ1103001) has 84 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 7 PFAS compounds found. This system serves 39,128 people using Surface Water sources.
How many people does AQUA NJ - HAMILTON SQUARE serve? ▼
AQUA NJ - HAMILTON SQUARE serves 39,128 people in HAMILTON, New Jersey. It is a Private-owned system using Surface Water water sources with 12,738 service connections.
What type of violations does AQUA NJ - HAMILTON SQUARE have? ▼
AQUA NJ - HAMILTON SQUARE has 84 total violations: 3 health-based violations (MCL exceedances or treatment failures), 77 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in AQUA NJ - HAMILTON SQUARE water? ▼
Yes. UCMR5 testing detected 7 PFAS compounds in AQUA NJ - HAMILTON SQUARE's water supply: PFOS, PFPeA, PFHpA, PFOA, PFHxA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does AQUA NJ - HAMILTON SQUARE use? ▼
AQUA NJ - HAMILTON SQUARE uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial