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Community Water System · PWS NJ1911006

Hardyston Twp Mua

Hardyston Twp, New Jersey 07419 - drinking water served from groundwater sources to 1,963 people, tracked in EPA SDWIS and UCMR5.

1,963
People served
203
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 203 drinking-water violations at Hardyston Twp Mua - above the New Jersey per-system average.

203
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
1,963
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hardyston Twp Mua

Hardyston Twp Mua is a local-owned community water system that delivers drinking water to 1,963 residents in Hardyston Twp, New Jersey (Sussex County) through 738 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 203 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 190 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 136 violations (MR). 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. Statewide, 208 of 264 UCMR5-tested systems have reported PFAS detections (78.8%).

Hardyston Twp Mua's 203 violations sit above the New Jersey average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,963
Total Violations
203
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
738
County
Sussex
School/Daycare
No
MCL Violations
0
Monitoring Violations
190
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 136 2008
Consumer Confidence Rule Other 6 2025
Chlorine MR 4 2016
ETHYLENE DIBROMIDE MR 4 2019
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2019
Fluoride MR 2 1993
Arsenic MR 2 1993
Barium MR 2 1993
Cadmium MR 2 1993
Chromium MR 2 1993
Mercury MR 2 1993
Selenium MR 2 1993
Public Notice Other 2 2005
Lead and Copper Rule MR 1 2024
Antimony, Total MR 1 1993
Beryllium, Total MR 1 1993
Nitrate MR 1 1988
DICHLOROMETHANE MR 1 2004
o-Dichlorobenzene MR 1 2004
p-Dichlorobenzene MR 1 2004
1,1-Dichloroethylene MR 1 2004
trans-1,2-Dichloroethylene MR 1 2004
1,1,1-Trichloroethane MR 1 2004
Trichloroethylene MR 1 2004
Tetrachloroethylene MR 1 2004
Benzene MR 1 2004
Ethylbenzene MR 1 2004
Styrene MR 1 2004
Vinyl chloride MR 1 2004
Carbon tetrachloride MR 1 2004

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 Hardyston Twp Mua.

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 NJ1911006 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 Hardyston Twp Mua 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
2025 Consumer Confidence Rule Other 6 SDWIS / NJ1911006 / 7000
2024 Lead and Copper Rule MR 1 SDWIS / NJ1911006 / 5000
2019 ETHYLENE DIBROMIDE MR 4 SDWIS / NJ1911006 / 2946
2019 1,2-DIBROMO-3-CHLOROPROPANE MR 4 SDWIS / NJ1911006 / 2931
2016 Chlorine MR 4 SDWIS / NJ1911006 / 0999
2008 Coliform (TCR) MR 136 SDWIS / NJ1911006 / 3100
2005 Public Notice Other 2 SDWIS / NJ1911006 / 7500
2004 DICHLOROMETHANE MR 1 SDWIS / NJ1911006 / 2964
2004 o-Dichlorobenzene MR 1 SDWIS / NJ1911006 / 2968
2004 p-Dichlorobenzene MR 1 SDWIS / NJ1911006 / 2969
2004 1,1-Dichloroethylene MR 1 SDWIS / NJ1911006 / 2977
2004 trans-1,2-Dichloroethylene MR 1 SDWIS / NJ1911006 / 2979
2004 1,1,1-Trichloroethane MR 1 SDWIS / NJ1911006 / 2981
2004 Trichloroethylene MR 1 SDWIS / NJ1911006 / 2984
2004 Tetrachloroethylene MR 1 SDWIS / NJ1911006 / 2987

How Hardyston Twp Mua Compares

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

Metric Hardyston Twp Mua New Jersey avg Federal benchmark
Total violations 203 59.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 1,963 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Hardyston Twp Mua water safe to drink? ▼
Hardyston Twp Mua (PWS ID: NJ1911006) has 203 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,963 people using Groundwater sources.
How many people does Hardyston Twp Mua serve? ▼
Hardyston Twp Mua serves 1,963 people in Hardyston Twp, New Jersey. It is a Local-owned system using Groundwater water sources with 738 service connections.
What type of violations does Hardyston Twp Mua have? ▼
Hardyston Twp Mua has 203 total violations: 0 health-based violations (MCL exceedances or treatment failures), 190 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hardyston Twp Mua water? ▼
No PFAS testing data is available for Hardyston Twp Mua under the EPA's UCMR5 monitoring program.
What water source does Hardyston Twp Mua use? ▼
Hardyston Twp Mua uses Groundwater 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.