Marion, OH
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Marion in Ohio · Population: 65,145
Marion, OH is tracked across three EPA datasets covering 14 Toxics Release Inventory (TRI) facilities, 3 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 42/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 8.0M lbs of reported toxic releases under EPCRA Section 313, while 1 water system carries an active health-based violation in the SDWIS record. No EPA Air Quality System monitors currently report data for this county.
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Water Systems (3)
| System | Population | Violations |
|---|---|---|
| AQUA OHIO - MARION | 46,317 | 0 |
| AQUA OHIO - TIFFIN | 20,035 | 0 |
| AQUA OHIO - LA RUE VILLAGE | 800 | 1 |
TRI Facilities (14)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Ohio Galvanizing Corp | 5.8M lbs |
| 2 | Whirlpool Corp Marion Operations | 1.0M lbs |
| 3 | Nucor Steel Marion Inc | 982.2K lbs |
| 4 | Poet Biorefining-Marion LLC | 119.1K lbs |
| 5 | Sika Corp-Marion Operations | 19.5K lbs |
| 6 | Nachurs Alpine Solutions | 7.6K lbs |
| 7 | Glen-Gery Corp | 6.4K lbs |
| 8 | Semco Inc | 363 lbs |
| 9 | Hildreth Manufacturing LLC | 145 lbs |
| 10 | Glen-Gery Corp | 76 lbs |
| 11 | US Yachiyo Inc | 1 lbs |
| 12 | Arcelormittal Tubular Products USA LLC | 1 lbs |
| 13 | Mills Co | 0 lbs |
| 14 | Overhead Door Co Todco Div | 0 lbs |
Cities in Marion (4)
Frequently Asked Questions
What is the environmental risk level in Marion, Ohio? ▼
Are there Superfund sites in Marion? ▼
How many toxic release facilities are in Marion? ▼
What is the air quality in Marion? ▼
Is the drinking water safe in Marion? ▼
What environmental agencies cover Marion? ▼
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.