Warren County, NJ
The federal environmental record for Warren County (population 111,252): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
13
federal cleanup sites
3
PFAS-detecting water systems
6
TRI facilities
50
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Pohatcong Valley Ground Water Contamination | Warren County | on the NPL | 03/31/1989 |
Drinking water: PFAS testing
Public water systems serving Warren with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| NJ AMERICAN WATER - SHORT HILLS NJ0712001 | PFPeA: 27.5 ng/L PFHxA: 11.2 ng/L PFOA: 9.1 ng/L | above final limit |
| NJ AMERICAN WATER - WASHINGTON/OXFORD NJ2121001 | PFOS: 7.1 ng/L PFOA: 5.1 ng/L PFHxS: 3 ng/L | above final limit |
| ALLAMUCHY TWP WATER & SEWER NJ2101001 | PFHxS: 3.3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
6 facilities in Warren filed TRI reports for 2024, totalling 661k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| MCWANE DUCTILE-NEW JERSEY | PHILLIPSBURG | Zinc compounds, Manganese And Manganese Compounds | 533k lb |
| AVANTOR PERFORMANCE MATERIALS | PHILLIPSBURG | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 73k lb |
| DSM NUTRITIONAL PRODUCTS LLC | BELVIDERE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 55k lb |
| ANDREX | HACKETTSTOWN | - | 0 lb |
| BOREALIS COMPOUNDS INC. | PORT MURRAY | - | 0 lb |
| BASF CORP | WASHINGTON | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 410 tank facilities in Warren: 261 tanks in service and 1,142 closed. 229 fuel releases are on record, of which 50 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Warren as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Warren, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ALPHA BOROUGH SANITARY LANDFILLPHILLIPSBURG
- ALPHA QUARRYALPHA BOROUGH
- ATLANTIC STATES CAST IRON PIPEPHILLIPSBURG
- BASF WYANDOTTE CORPWASHINGTON
- CARE ENVIRONMENTAL CORP - HACKETTSTOWNHACKETTSTOWN
- FASCO FINISHING CO.,PHILLIPSBURG
- HACKETTSTOWN ABANDONED DRUMS SITEHACKETTSTOWN
- HIGH POINT SANITARY LANDFILLWASHINGTON
- HOFFMAN - LA ROCHE INCWHITE TOWNSHIP
- NATIONAL PARK SERVICESVC/DE WATER GAPPAHAQUARRY
- POHATCONG VALLEY GROUND WATER CONTAMINATIONWASHINGTON
- ROUTE 31 SLUDGE DISPOSALWASHINGTON
- WHITE ROX CHEMICALPHILLIPSBURG