Warren, NJ
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Warren in New Jersey · Population: 110,238
TRI sites such as McWane Ductile-New Jersey; Avantor Performance Materials; Dsm Nutritional Products LLC; SDWIS systems such as HACKETTSTOWN MUA; NJ AMERICAN WATER - ROXBURY; ALLAMUCHY TWP WATER & SEWER; NPL sites such as Pohatcong Valley Ground Water Contamination anchor Warren, NJ's EPA extract. Derived burden score 43/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Warren include ALPHA MUNICIPAL WATER WORKS; TRANQUIL VALLEY RETREAT CENTER; HIGHLANDER HILLS ESTATES, while McWane Ductile-New Jersey leads reported TRI pounds among local Form R filers. AQS median AQI 36 / peak 108 in 2024.
Burden score 43/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Warren -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Warren, NJ: EPA TRI 2023 reporting year
Same facilities, both years
-20.6%
5 facilities that filed in 2022 and 2023
Whole inventory
-20.6%
1.1 million lb → 858.2 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Warren, NJ's total reported releases fell from 1.1 million lb in 2022 to 858.2 thousand lb in 2023, based on EPA TRI filings.
- Warren, NJ's water releases fell from 123.4 thousand lb in 2022 to 67.0 thousand lb in 2023, based on EPA TRI filings.
- Warren, NJ's off-site transfers fell from 930.4 thousand lb in 2022 to 767.7 thousand lb in 2023, based on EPA TRI filings.
- Warren, NJ's air releases fell from 26.9 thousand lb in 2022 to 23.5 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 284 (80%) | 71 | 2 | 108 |
| 2023 | 241 (67%) | 114 | 1 | 197 |
| 2022 | 241 (66%) | 122 | 0 | 86 |
| 2021 | 237 (66%) | 120 | 1 | 136 |
| 2020 | 287 (80%) | 74 | 0 | 100 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in New Jersey, see the EPA's AirNow.gov.
Water Systems (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| HACKETTSTOWN MUA | 22,000 | 0 |
| NJ AMERICAN WATER - ROXBURY | 11,793 | 0 |
| ALLAMUCHY TWP WATER & SEWER | 5,423 | 0 |
| ALPHA MUNICIPAL WATER WORKS | 2,530 | 2 |
| TOWNSHIP OF BLAIRSTOWN DPW | 800 | 0 |
| WARREN HAVEN REHABILITATION & NURSING CT | 430 | 0 |
| AQUA NJ - BYRAM | 400 | 0 |
| TRANQUIL VALLEY RETREAT CENTER | 232 | 2 |
| FOREST MANOR RETIREMENT HOME | 224 | 0 |
| HIGHLANDER HILLS ESTATES | 120 | 2 |
| RIVERSIDE MHP | 85 | 0 |
| CLOVER REST HOME | 64 | 1 |
| OXFORD HERITAGE MANOR | 60 | 0 |
TRI Facilities (6)
| # | Facility | Total Releases |
|---|---|---|
| 1 | McWane Ductile-New Jersey | 4.0M lbs |
| 2 | Avantor Performance Materials | 490.3K lbs |
| 3 | Dsm Nutritional Products LLC | 266.0K lbs |
| 4 | Borealis Compounds Inc. | 1.2K lbs |
| 5 | Andrex | 0 lbs |
| 6 | Basf Corp | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Pohatcong Valley Ground Water Contamination | NPL Site | 28.90 |
Cities in Warren (13)
Frequently Asked Questions
What is the environmental risk level in Warren, New Jersey? ▼
Are there Superfund sites in Warren? ▼
How many toxic release facilities are in Warren? ▼
What is the air quality in Warren? ▼
Is the drinking water safe in Warren? ▼
What environmental agencies cover Warren? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.