Public water system · NJ1025001
ActiveEdna Mahan Correctional
At a glance
Edna Mahan Correctional (PWSID NJ1025001) is an active community water system in Hunterdon County, New Jersey. It reports serving 940 people through 32 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
940
Service connections
32
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Edna Mahan Correctional compare with other water systems in Hunterdon County?
By EPA's size categories, Edna Mahan Correctional is a small system (501 to 3,300 people). Hunterdon County has 293 active public water systems. Its population served is about 3 times the county average of 313 people per system, and accounts for 1% of the 91,772 people reported by systems filed under the county. Across New Jersey, the 3,496 active systems average 2,750 people each. Nationally, the average active community water system reports serving 6,703 people, so Edna Mahan Correctional is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. New Jersey has 582 active community water systems, 17% of the state's 3,496 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,313 New Jersey systems (95%) list groundwater as their primary source.
Who owns and regulates Edna Mahan Correctional?
EPA lists Edna Mahan Correctional as owned by a state government. The NJ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 13 of the 293 active systems in Hunterdon County (4.4%) are also owned by a state government.
Does Edna Mahan Correctional have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2021. The violations listed here began between June 1994 and July 2021. By type: 9 monitoring and reporting, 1 reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 10 as resolved and 2 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-07-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2012-05-30 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2005-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2005-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 1997-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1994-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Edna Mahan Correctional: frequently asked questions
Who runs Edna Mahan Correctional?
Edna Mahan Correctional (PWSID NJ1025001) is a community water system owned by a state government. It is regulated by the NJ state drinking water program.
How many people does Edna Mahan Correctional serve?
Edna Mahan Correctional reports serving 940 people through 32 service connections in Hunterdon County, New Jersey.
Where does Edna Mahan Correctional get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Edna Mahan Correctional have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2021. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Edna Mahan Correctional's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the NJ state drinking water program.
Where can I find Edna Mahan Correctional's water quality report?
As a community water system, Edna Mahan Correctional must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Hunterdon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Clinton Water Dept | Hunterdon | 12,500 | Community | Groundwater |
| Flemington Water Department | Hunterdon | 4,581 | Community | Groundwater |
| Veolia Water New Jersey Lambertville | Hunterdon | 3,960 | Community | Surface water |
| Washington Twp Mua-Hager | Hunterdon + 1 more | 3,458 | Community | Groundwater |
| High Bridge W Dept | Hunterdon | 3,300 | Community | Groundwater |
| State of Nj Spruce Run Recreat | Hunterdon | 2,800 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Edna Mahan Correctional, PWSID NJ1025001, New Jersey”, https://aquacensus.com/water-systems/new-jersey/edna-mahan-correctional-nj1025001 (data as of October 1, 2026).