Warren, OH
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.
Environmental data for Warren in Ohio · Population: 246,364
TRI sites such as Mauser - Mason; Advics Manufacturing Ohio Inc; High Concrete Group Llc-Springboro; SDWIS systems such as WESTERN WATER COMPANY; LEBANON CITY; SPRINGBORO PWS; NPL sites such as Peters Cartridge Factory anchor Warren, OH's EPA extract. Derived burden score 54/100 (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 WAYNESVILLE VILLAGE PWS; MORROW VILLAGE PWS; OTTERBEIN-LEBANON RETREAT CENTER, while Mauser - Mason leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 147 in 2024.
Burden score 54/100 (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, OH: EPA TRI 2023 reporting year
Same facilities, both years
+4.2%
21 facilities that filed in 2022 and 2023
Whole inventory
+3.9%
157.2 thousand lb → 163.3 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Warren, OH's total reported releases rose from 156.8 thousand lb in 2022 to 163.3 thousand lb in 2023, based on EPA TRI filings.
- Warren, OH's land releases fell from 14.9 thousand lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Warren, OH's off-site transfers rose from 52.2 thousand lb in 2022 to 72.7 thousand lb in 2023, based on EPA TRI filings.
- Warren, OH's chemicals reported rose from 22 in 2022 to 24 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 | 267 (73%) | 92 | 6 | 147 |
| 2023 | 230 (63%) | 127 | 5 | 183 |
| 2022 | 231 (65%) | 122 | 3 | 133 |
| 2021 | 230 (64%) | 128 | 2 | 119 |
| 2020 | 248 (69%) | 109 | 4 | 115 |
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 Ohio, see the EPA's AirNow.gov.
Water Systems (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WESTERN WATER COMPANY | 39,508 | 0 |
| LEBANON CITY | 20,700 | 0 |
| SPRINGBORO PWS | 19,263 | 0 |
| FRANKLIN PUBLIC WATER SYSTEM | 11,690 | 0 |
| WAYNESVILLE VILLAGE PWS | 4,100 | 3 |
| SOUTH LEBANON CITY PWS | 3,891 | 0 |
| LEBANON CORRECTIONAL INSTITUTION | 3,410 | 0 |
| MORROW VILLAGE PWS | 3,360 | 1 |
| CARLISLE CITY PWS | 1,675 | 0 |
| SOUTH CHARLESTON VILLAGE PWS | 1,660 | 0 |
| OTTERBEIN-LEBANON RETREAT CENTER | 1,541 | 2 |
| LEESBURG VILLAGE | 1,315 | 1 |
| SOUTH LEBANON PWS NO 2 | 180 | 0 |
TRI Facilities (28)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Peters Cartridge Factory | NPL Site | 50.00 |
Cities in Warren (10)
Frequently Asked Questions
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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.