Clark, OH
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Clark in Ohio · Population: 135,445
Clark, OH is tracked across three EPA datasets covering 15 Toxics Release Inventory (TRI) facilities, 19 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 35/100 (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 290.3K lbs of reported toxic releases under EPCRA Section 313, while 2 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 45 and a peak AQI of 133 in 2024, with 66% of observed days rated "Good" (0–50).
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.
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 | 239 (66%) | 121 | 3 | 133 |
| 2023 | 187 (51%) | 170 | 5 | 196 |
| 2022 | 212 (63%) | 125 | 1 | 129 |
| 2021 | 169 (46%) | 196 | 0 | 100 |
| 2020 | 218 (64%) | 124 | 1 | 108 |
Source: EPA Air Quality System (AQS) Annual AQI by County 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 (19)
| System | Population | Violations |
|---|---|---|
| SPRINGFIELD CITY PWS | 60,680 | 0 |
| CLARK COUNTY NORTHRIDGE PWS | 8,874 | 0 |
| NEW CARLISLE CITY PWS | 5,800 | 0 |
| CLARK COUNTY PARK LAYNE PWS | 4,221 | 0 |
| CLARK COUNTY GREEN MEADOWS 2 PWS | 3,008 | 0 |
| ENON VILLAGE PWS | 2,415 | 0 |
| FAIRWAY TERRACE MHP PWS | 800 | 0 |
| NORTH HAMPTON VILLAGE PWS | 538 | 0 |
| HARMONY ESTATES MOBILE HOME PARK | 507 | 0 |
| SOUTH VIENNA VILLAGE PWS | 393 | 24 |
| CLARK COUNTY ROCKWAY PWS | 383 | 0 |
| CLARK COUNTY LAWRENCEVILLE PWS | 302 | 0 |
| GARDEN ACRES WATER COMPANY PWS | 260 | 0 |
| CATAWBA VILLAGE PWS | 241 | 0 |
| COUNTRY HAVEN MHP PWS | 234 | 0 |
| CLARK COUNTY LIMECREST PWS | 215 | 0 |
| GREENLAWN CONDOS | 203 | 30 |
| BROOKWOOD MHP PWS | 145 | 0 |
| ENON HEIGHTS MHP PWS | 85 | 0 |
TRI Facilities (15)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Teikuro Corp | 99.2K lbs |
| 2 | International Motors Llc. | 77.1K lbs |
| 3 | Silfex Inc | 56.2K lbs |
| 4 | Parker Trutec | 30.9K lbs |
| 5 | Os Kelly Co | 16.3K lbs |
| 6 | Superior Trim - Springfield Div | 5.4K lbs |
| 7 | Rawac Plating Co | 3.4K lbs |
| 8 | The Champion Co | 1.2K lbs |
| 9 | Cascade Corp | 399 lbs |
| 10 | Yamada Na Inc | 260 lbs |
| 11 | Armoloy of Ohio Inc. | 0 lbs |
| 12 | Pfi Precision New Carlisle Ohio | 0 lbs |
| 13 | Dole Fresh Vegetables | 0 lbs |
| 14 | Dfa Dairy Brands Fluid LLC DBA Reiter Dairy | 0 lbs |
| 15 | Oldcastle Lawn & Garden | 0 lbs |
Cities in Clark (4)
Frequently Asked Questions
What is the environmental risk level in Clark, Ohio? ▼
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How many toxic release facilities are in Clark? ▼
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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.