TRI Facilities
1,546
EPCRA Section 313 reporters
2023 EPA TRI data 1,546 facilities 1,094 water systems
Ohio Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Ohio's (OH) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
OH regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
310 records
- RCRA · Subtitle C 50
RCRA Subtitle C (Superfund-site proxy)
50 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
1,094
SDWIS regulated
Superfund Sites
50
37 active NPL
Total Releases
485.0M lbs
TRI cumulative disclosure
Compliance Snapshot - OH
Sites with no recorded health violations 88.3%
Sites with at least one open violation 11.7%
Ohio consolidates three federal EPA datasets into one statewide environmental profile: 1,546 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 1,094 community water systems regulated under the Safe Drinking Water Act, and 50 sites on the Superfund National Priorities List.
TRI facilities in OH have cumulatively disclosed 485.0M lbs of toxic chemical releases, while SDWIS records show 1,386 total violations across the state's regulated water systems, of which 310 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Cuyahoga, Hamilton, Stark, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
1,546
Water Systems
1,094
Superfund Sites
50
Total Violations
1,386
Total Releases
485.0M lbs
Health Violations
310
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Ineos Nitriles USA LLC | 42.4M lbs |
| 2 | Cleveland-Cliffs Cleveland Works LLC | 31.2M lbs |
| 3 | Gavin Power LLC | 30.9M lbs |
| 4 | Vickery Environmental Inc. | 27.5M lbs |
| 5 | Ineos Pigments USA Inc | 27.2M lbs |
| 6 | Cleveland-Cliffs Steel Corp | 21.3M lbs |
| 7 | Envirite of Ohio Inc | 17.6M lbs |
| 8 | Pcs Nitrogen Ohio L.P. | 15.6M lbs |
| 9 | W H Sammis Plant | 15.2M lbs |
| 10 | Ineos Pigments USA Inc | 13.6M lbs |
| 11 | Cardinal Plant | 10.9M lbs |
| 12 | Kyger Creek Station | 8.0M lbs |
| 13 | Kraton Corp | 6.2M lbs |
| 14 | Walleye Power LLC - Bay Shore Plant | 6.2M lbs |
| 15 | Cleveland-Cliffs Steel Corp - Mansfield Works | 6.0M lbs |
| 16 | Ohio Galvanizing Corp | 5.8M lbs |
| 17 | Materion Brush Inc | 5.1M lbs |
| 18 | Scotts Co | 5.1M lbs |
| 19 | Cleveland-Cliffs Inc. | 5.0M lbs |
| 20 | Imco Recycling of Ohio LLC | 5.0M lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| MAYSVILLE REGIONAL WATER | 6,540 | 71 |
| HAMLER VILLAGE | 580 | 64 |
| BRUNERSBURG WD - EVANSPORT | 268 | 49 |
| HOLGATE VILLAGE | 1,150 | 43 |
| WAUSEON CITY | 7,568 | 34 |
| NELSONVILLE PWS | 6,656 | 30 |
| GREENLAWN CONDOS | 203 | 30 |
| BRUNERSBURG WD - AIRPORT | 40 | 30 |
| VAN WERT CITY | 10,846 | 29 |
| WEST FARMINGTON VILLAGE PWS | 908 | 28 |
| DEFIANCE CITY | 16,494 | 27 |
| NORTHWESTERN W AND SD - MCCOMB | 1,650 | 27 |
| AYERSVILLE WATER AND SEWER DISTRICT | 1,660 | 26 |
| SOUTH VIENNA VILLAGE PWS | 393 | 24 |
| NORTHWESTERN W AND SD - CO RD P | 440 | 24 |
| NEW LEXINGTON | 5,161 | 23 |
| BYESVILLE | 5,104 | 21 |
| HAMDEN VILLAGE PWS | 970 | 21 |
| ARCADIA VILLAGE | 564 | 20 |
| DELTA VILLAGE | 3,518 | 18 |
Cities with Water Issues
Columbus
Pop: -
Urbana
Pop: -
Westerville
Pop: -
Grove City
Pop: -
Jeffersonville
Pop: -
Lockbourne
Pop: -
Logan
Pop: -
London
Pop: -
West Jefferson
Pop: -
Marion
Pop: -
Kenton
Pop: -
Bowling Green
Pop: -
Elmore
Pop: -
Fremont
Pop: -
Genoa
Pop: -
Port Clinton
Pop: -
Archbold
Pop: -
Defiance
Pop: -
Delta
Pop: -
Montpelier
Pop: -
Superfund Sites (50)
Counties (90 total)
| County | Facilities |
|---|---|
| Cuyahoga | 163 |
| Hamilton | 97 |
| Stark | 64 |
| Summit | 68 |
| Franklin | 66 |
| Montgomery | 48 |
| Butler | 58 |
| Lake | 54 |
| Lorain | 44 |
| Lucas | 48 |
| Wayne | 35 |
| Portage | 28 |
| Trumbull | 25 |
| Wood | 31 |
| Ashtabula | 36 |
| Tuscarawas | 31 |
| Richland | 18 |
| Warren | 28 |
| Geauga | 21 |
| Miami | 25 |
Showing top 20 counties by environmental activity. Ohio has 90 counties total.
Largest Cities
Vandalia
Pop: -
6 facilities · 2 water systems
Blacklick
Pop: -
1 facilities · 1 water systems
Columbus
Pop: -
46 facilities · 15 water systems
Delaware
Pop: -
11 facilities · 2 water systems
Fredericktown
Pop: -
1 facilities · 1 water systems
Hebron
Pop: -
7 facilities · 1 water systems
Hilliard
Pop: -
6 facilities · 0 water systems
Johnstown
Pop: -
2 facilities · 2 water systems
New Albany
Pop: -
2 facilities · 0 water systems
Marysville
Pop: -
3 facilities · 1 water systems
Mount Vernon
Pop: -
3 facilities · 4 water systems
Newark
Pop: -
5 facilities · 5 water systems
Heath
Pop: -
4 facilities · 1 water systems
Reynoldsburg
Pop: -
2 facilities · 1 water systems
Saint Paris
Pop: -
1 facilities · 1 water systems
Sunbury
Pop: -
2 facilities · 0 water systems
Urbana
Pop: -
5 facilities · 2 water systems
Westerville
Pop: -
1 facilities · 8 water systems
Worthington
Pop: -
1 facilities · 0 water systems
Ashville
Pop: -
1 facilities · 1 water systems
Frequently Asked Questions
How many polluting facilities are in Ohio? ▼
Ohio has 1,546 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 485.0M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Ohio have Superfund sites? ▼
Yes, Ohio has 50 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in Ohio? ▼
Ohio has 1,094 EPA-regulated water systems. 310 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for Ohio? ▼
PlainEnviro provides three categories of EPA environmental data for Ohio: Toxic Release Inventory (TRI) data covering 1,546 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 1,094 water systems, and Superfund National Priorities List (NPL) data for 50 contaminated sites.
How does Ohio compare to other states environmentally? ▼
Ohio has 1,546 TRI facilities with 485.0M lbs in total releases, 50 Superfund sites, and 1,386 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for Ohio
TRI Facilities in Ohio →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Ohio →
Community water systems and their violation records
Air Quality in Ohio →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Ohio: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Ohio's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 1,546 TRI facilities reporting in Ohio for the largest reported releases near a specific county. View facilities
- 310 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Ohio compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.