AQUA NJ - HARKERS HOLLOW
PWS ID: NJ2110003 · HAMILTON, New Jersey 08691
AQUA NJ - HARKERS HOLLOW serves 40 people in HAMILTON, New Jersey using Groundwater water sources. It has 130 recorded EPA violations, including 17 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: AQUA NJ - HARKERS HOLLOW
AQUA NJ - HARKERS HOLLOW is a private-owned community water system that delivers drinking water to 40 residents in HAMILTON, New Jersey (Warren County) through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 130 total violations for this system , of which 17 (13%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 109 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.
The most frequently cited contaminant at this system is Coliform (TCR), recorded in 17 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
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 - HARKERS HOLLOW's 130 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.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 17
- County
- Warren
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 109
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 17 | 2009 |
| Lead and Copper Rule | MR | 9 | 2025 |
| TTHM | MR | 6 | 2020 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2020 |
| Groundwater Rule | MR | 4 | 2023 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2017 |
| cis-1,2-Dichloroethylene | MR | 4 | 2017 |
| Xylenes, Total | MR | 4 | 2017 |
| DICHLOROMETHANE | MR | 4 | 2017 |
| o-Dichlorobenzene | MR | 4 | 2017 |
| Vinyl chloride | MR | 4 | 2017 |
| 1,1-Dichloroethylene | MR | 4 | 2017 |
| 1,2-Dichloroethane | MR | 4 | 2017 |
| 1,1,1-Trichloroethane | MR | 4 | 2017 |
| Carbon tetrachloride | MR | 4 | 2017 |
| 1,2-Dichloropropane | MR | 4 | 2017 |
| 1,1,2-Trichloroethane | MR | 4 | 2017 |
| Tetrachloroethylene | MR | 4 | 2017 |
| CHLOROBENZENE | MR | 4 | 2017 |
| Toluene | MR | 4 | 2017 |
| Ethylbenzene | MR | 4 | 2017 |
| Revised Total Coliform Rule | RPT | 4 | 2021 |
| Benzene | MR | 4 | 2017 |
| p-Dichlorobenzene | MR | 4 | 2017 |
| Styrene | MR | 4 | 2017 |
| Trichloroethylene | MR | 4 | 2017 |
| trans-1,2-Dichloroethylene | MR | 4 | 2017 |
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 - HARKERS HOLLOW.
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 NJ2110003 on SDWISSource: EPA SDWIS Federal Reports Search
New Jersey Drinking Water Authority
NJ DEP — Bureau of Safe Drinking Water is the primacy agency that licenses and inspects AQUA NJ - HARKERS HOLLOW under EPA-delegated authority.
Open NJ regulator portalViolation 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 |
|---|---|---|---|---|
| 2025 | Lead and Copper Rule | MR | 9 | SDWIS / NJ2110003 / 5000 |
| 2023 | Groundwater Rule | MR | 4 | SDWIS / NJ2110003 / 0700 |
| 2021 | Revised Total Coliform Rule | RPT | 4 | SDWIS / NJ2110003 / 8000 |
| 2020 | TTHM | MR | 6 | SDWIS / NJ2110003 / 2950 |
| 2020 | Total Haloacetic Acids (HAA5) | MR | 6 | SDWIS / NJ2110003 / 2456 |
| 2017 | 1,2,4-Trichlorobenzene | MR | 4 | SDWIS / NJ2110003 / 2378 |
| 2017 | cis-1,2-Dichloroethylene | MR | 4 | SDWIS / NJ2110003 / 2380 |
| 2017 | Xylenes, Total | MR | 4 | SDWIS / NJ2110003 / 2955 |
| 2017 | DICHLOROMETHANE | MR | 4 | SDWIS / NJ2110003 / 2964 |
| 2017 | o-Dichlorobenzene | MR | 4 | SDWIS / NJ2110003 / 2968 |
| 2017 | Vinyl chloride | MR | 4 | SDWIS / NJ2110003 / 2976 |
| 2017 | 1,1-Dichloroethylene | MR | 4 | SDWIS / NJ2110003 / 2977 |
| 2017 | 1,2-Dichloroethane | MR | 4 | SDWIS / NJ2110003 / 2980 |
| 2017 | 1,1,1-Trichloroethane | MR | 4 | SDWIS / NJ2110003 / 2981 |
| 2017 | Carbon tetrachloride | MR | 4 | SDWIS / NJ2110003 / 2982 |
How AQUA NJ - HARKERS HOLLOW Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | AQUA NJ - HARKERS HOLLOW | New Jersey avg | Federal benchmark |
|---|---|---|---|
| Total violations | 130 | 59.8 | SDWA compliance — any non-zero count is a recorded breach |
| Health-based violations | 17 | 6.5 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 78.8% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 40 | 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
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Related Data for New Jersey
Read our methodology — how this data is sourced, computed, and verified.