Public water system · NJ1803002
ActiveNj American Water - Twin Lakes
At a glance
Nj American Water - Twin Lakes (PWSID NJ1803002) is an active community water system in Somerset County, New Jersey. It reports serving 250 people through 50 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
250
Service connections
50
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Nj American Water - Twin Lakes compare with other water systems in Somerset County?
By EPA's size categories, Nj American Water - Twin Lakes is a very small system (500 people or fewer). Somerset County has 91 active public water systems. Its population served is well below the county average of 797 people per system, and accounts for 0.3% 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 Nj American Water - Twin Lakes 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 Nj American Water - Twin Lakes?
EPA lists Nj American Water - Twin Lakes as privately owned. 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. 71 of the 91 active systems in Somerset County (78%) are also privately owned.
Does Nj American Water - Twin Lakes have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2006. The violations listed here began between June 1988 and January 2006. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 8 as archived and 4 as resolved. 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. 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 |
|---|---|---|---|---|
| 2006-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2000-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1988-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 1988-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Archived |
| 1988-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1988-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1988-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | 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.
Nj American Water - Twin Lakes: frequently asked questions
Who runs Nj American Water - Twin Lakes?
Nj American Water - Twin Lakes (PWSID NJ1803002) is a community water system privately owned. It is regulated by the NJ state drinking water program.
How many people does Nj American Water - Twin Lakes serve?
Nj American Water - Twin Lakes reports serving 250 people through 50 service connections in Somerset County, New Jersey.
Where does Nj American Water - Twin Lakes 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 Nj American Water - Twin Lakes 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 January 2006. 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 Nj American Water - Twin Lakes' 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 January 2006. For current results, consult the system's annual water quality report, EPA ECHO, or the NJ state drinking water program.
Where can I find Nj American Water - Twin Lakes' water quality report?
As a community water system, Nj American Water - Twin Lakes 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 |
| Rocky Hill W Dept | Somerset | 687 | Community | Groundwater |
| Hillsborough Board of Education | Somerset | 540 | 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, “Nj American Water - Twin Lakes, PWSID NJ1803002, New Jersey”, https://aquacensus.com/water-systems/new-jersey/nj-american-water-twin-lakes-nj1803002 (data as of October 1, 2026).