Public water system · NJ1104001
ActiveHightstown Water Department
At a glance
Hightstown Water Department (PWSID NJ1104001) is an active community water system in Mercer County, New Jersey. It reports serving 5,400 people through 1,733 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local 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
5,400
Service connections
1,733
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hightstown Water Department compare with other water systems in Mercer County?
By EPA's size categories, Hightstown Water Department is a medium system (3,301 to 10,000 people). Mercer County has 97 active public water systems, and Hightstown Water Department is the 5th-largest of them by population served. Its population served is about 62% above the county average of 3,340 people per system, and accounts for 1.7% of the 323,956 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 Hightstown Water Department is about 19% 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 Hightstown Water Department?
EPA lists Hightstown Water Department as owned by a local 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. 17 of the 97 active systems in Mercer County (18%) are also owned by a local government.
Does Hightstown Water Department 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 April 2008 and July 2021. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (2 of them). EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
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.
Hightstown Water Department: frequently asked questions
Who runs Hightstown Water Department?
Hightstown Water Department (PWSID NJ1104001) is a community water system owned by a local government. It is regulated by the NJ state drinking water program.
How many people does Hightstown Water Department serve?
Hightstown Water Department reports serving 5,400 people through 1,733 service connections in Mercer County, New Jersey.
Where does Hightstown Water Department 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 Hightstown Water Department 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 Hightstown Water Department'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 Hightstown Water Department's water quality report?
As a community water system, Hightstown Water Department 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 Mercer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Trenton Water Works | Mercer | 217,000 | Community | Surface water |
| Aqua Nj - Hamilton Square | Mercer | 39,128 | Community | Purchased surface water |
| East Windsor Mua | Mercer | 25,000 | Community | Groundwater |
| Aqua Nj - Lawrence | Mercer | 8,655 | Community | Groundwater under influence of surface water |
| Pennington Shop-Rite | Mercer | 3,663 | Non-transient non-community | Groundwater |
| Pennington W Dept | Mercer | 2,600 | Community | Groundwater |
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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, “Hightstown Water Department, PWSID NJ1104001, New Jersey”, https://aquacensus.com/water-systems/new-jersey/hightstown-water-department-nj1104001 (data as of October 1, 2026).