Warren County, NJ Water Quality Guide

Provider mappings, reported contaminant levels, and water help information for Warren County, NJ.

About Warren County, NJ Water

Warren County is served by multiple public water systems, utilities, and report records. The provider and contaminant information below is organized by PWS ID rather than treated as one countywide water result.

Municipality-level mapping: Pending verified NJDEP or utility service-area records for the current inventory.

Utility and water-quality data

Water system providers for Warren County, NJ

This county page lists PWS systems represented in the current NJ source inventory. A county is not one water system; confirm the PWS ID on your bill or through NJDEP.

Data disclosure: Municipality-to-PWS relationships below are based on NJDEP municipal-boundary and public-community service-area GIS intersections. A mapped relationship does not guarantee service at every address.

Utility providers and PWS IDs

PWS ID	System	Provider	County	Status	Official links
`NJ2103001`	PWS ID: NJ2103001	New Jersey American Water Co.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2110001`	Brainard’s	Aqua New Jersey, Inc.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2110003`	Harker Hollow	Aqua New Jersey, Inc.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2119001`	Phillipsburg	Aqua New Jersey, Inc.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2120001`	NJ2120001	Aqua New Jersey, Inc.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2120002`	Warren Glen	Aqua New Jersey, Inc.	Warren County	verified-current	Utility/source links CCR/report finder
`NJ2121001`	PWS ID: NJ2121001	New Jersey American Water Co.	Warren County	verified-current	Utility/source links CCR/report finder

Municipality pages with available report data

Alpha — 1 report-linked PWS system
Belvidere — 1 report-linked PWS system
Franklin — 1 report-linked PWS system
Greenwich — 2 report-linked PWS systems
Harmony — 3 report-linked PWS systems
Hope — 1 report-linked PWS system
Knowlton — 1 report-linked PWS system
Liberty — 1 report-linked PWS system
Lopatcong — 1 report-linked PWS system
Mansfield — 3 report-linked PWS systems
Oxford — 2 report-linked PWS systems
Phillipsburg — 1 report-linked PWS system
Pohatcong — 3 report-linked PWS systems
Washington — 1 report-linked PWS system
Washington — 2 report-linked PWS systems
White — 2 report-linked PWS systems

Reported contaminant levels for Warren County, NJ

PWS ID	System	Contaminant	Reported level	Range	Limit	Comparison	Sample year	Source

All available reports

NJ2103001 PWS ID: NJ2103001 — Official CCR/report finder
NJ2110001 Brainard’s — Official CCR/report finder
NJ2110003 Harker Hollow — Official CCR/report finder
NJ2119001 Phillipsburg — Official CCR/report finder
NJ2120001 NJ2120001 — Official CCR/report finder
NJ2120002 Warren Glen — Official CCR/report finder
NJ2121001 PWS ID: NJ2121001 — Official CCR/report finder

How to read this info

How to Read This Info for Warren County, NJ

Start with the provider table and PWS ID. Compare the reported contaminant level and unit with the listed MCL, recommended upper limit, or action level. “Below / At / Above” is a direct comparison, not a formal compliance determination.

For address confirmation, use the NJDEP Drinking Water Viewer, EPA ECHO, and the official CCR links shown above.

FAQ

Frequently asked questions

Who is my water provider and source in Warren County?

Review the listed PWS IDs and providers above:

NJ2103001 — New Jersey American Water Co.
NJ2110001 — Aqua New Jersey, Inc.
NJ2110003 — Aqua New Jersey, Inc.
NJ2119001 — Aqua New Jersey, Inc.
NJ2120001 — Aqua New Jersey, Inc.
NJ2120002 — Aqua New Jersey, Inc.
NJ2121001 — New Jersey American Water Co.

Confirm the PWS ID on your bill or with NJDEP because counties are not single water systems.

Does Warren County have specific water quality issues?

Review the contaminant rows and official CCR sources above. Do not treat one system’s report as a countywide result.

NJ Water Quality is an independent educational resource. County and PWS mappings are discovery records and may not establish service at every address. Blank, dated, or limited data are disclosed above.

Last reviewed: July 13, 2026