Public water system · NJ1817001
ActiveRocky Hill W Dept
At a glance
Rocky Hill W Dept (PWSID NJ1817001) is an active community water system in Somerset County, New Jersey. It reports serving 687 people through 287 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, none is health-based, and the most recent began in November 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
687
Service connections
287
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rocky Hill W Dept compare with other water systems in Somerset County?
By EPA's size categories, Rocky Hill W Dept is a small system (501 to 3,300 people). Somerset County has 91 active public water systems, and Rocky Hill W Dept is the 5th-largest of them by population served. Its population served is about 14% below the county average of 797 people per system, and accounts for 0.9% of the 72,559 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 Rocky Hill W Dept 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 Rocky Hill W Dept?
EPA lists Rocky Hill W Dept 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. 20 of the 91 active systems in Somerset County (22%) are also owned by a local government.
Does Rocky Hill W Dept have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2023. The violations listed here began between January 2007 and November 2023. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Chlorine (5 of them). EPA lists 11 as resolved and 1 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 |
|---|---|---|---|---|
| 2023-11-23 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2019-11-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2015-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2007-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | 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.
Rocky Hill W Dept: frequently asked questions
Who runs Rocky Hill W Dept?
Rocky Hill W Dept (PWSID NJ1817001) is a community water system owned by a local government. It is regulated by the NJ state drinking water program.
How many people does Rocky Hill W Dept serve?
Rocky Hill W Dept reports serving 687 people through 287 service connections in Somerset County, New Jersey.
Where does Rocky Hill W Dept 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 Rocky Hill W Dept have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2023. 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 Rocky Hill W Dept'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, none is health-based, and the most recent began in November 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the NJ state drinking water program.
Where can I find Rocky Hill W Dept's water quality report?
As a community water system, Rocky Hill W Dept 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 Somerset County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Franklin Township Dept of Public Works | Somerset | 57,150 | Community | Purchased surface water |
| Duke Island Park | Somerset | 1,506 | Transient non-community | Groundwater |
| Dewitt Cabin and Pool | Somerset | 805 | Transient non-community | Groundwater |
| Far Hills Country Day School | Somerset | 700 | Non-transient non-community | Groundwater |
| Hillsborough Board of Education | Somerset | 540 | Non-transient non-community | Groundwater |
| Fiddlers Elbow Golf Course | Somerset | 500 | Non-transient non-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, “Rocky Hill W Dept, PWSID NJ1817001, New Jersey”, https://aquacensus.com/water-systems/new-jersey/rocky-hill-w-dept-nj1817001 (data as of October 1, 2026).