Mahoning, 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 Mahoning in Ohio · Population: 227,063
TRI sites such as Vallourec Star LP; Datco Manufacturing LLC; Astro Shapes LLC; SDWIS systems such as CANFIELD CITY PWS; SEBRING VILLAGE PWS; JACKSON/MILTON METRO WATER DISTRICT PWS anchor Mahoning, OH's EPA extract. Derived burden score 48/100 (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 Mahoning include SEBRING VILLAGE PWS; JACKSON/MILTON METRO WATER DISTRICT PWS; ISLAND CREEK HOMEOWNERS, while Vallourec Star LP leads reported TRI pounds among local Form R filers. AQS median AQI 44 / peak 93 in 2024.
Burden score 48/100 (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 Mahoning -- 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 Mahoning, OH: EPA TRI 2023 reporting year
Same facilities, both years
-17.0%
18 facilities that filed in 2022 and 2023
Whole inventory
-13.9%
245.7 thousand lb → 211.4 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.
- Mahoning, OH's total reported releases fell from 245.7 thousand lb in 2022 to 203.9 thousand lb in 2023, based on EPA TRI filings.
- Mahoning, OH's off-site transfers fell from 84.3 thousand lb in 2022 to 64.6 thousand lb in 2023, based on EPA TRI filings.
- Mahoning, OH's air releases fell from 161.2 thousand lb in 2022 to 139.1 thousand lb in 2023, based on EPA TRI filings.
- Mahoning, OH's water releases rose from 179 lb in 2022 to 201 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 | 239 (66%) | 122 | 0 | 93 |
| 2023 | 187 (51%) | 172 | 3 | 226 |
| 2022 | 214 (61%) | 132 | 3 | 129 |
| 2021 | 205 (56%) | 159 | 1 | 110 |
| 2020 | 251 (69%) | 113 | 1 | 142 |
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 (4)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CANFIELD CITY PWS | 7,706 | 0 |
| SEBRING VILLAGE PWS | 6,058 | 15 |
| JACKSON/MILTON METRO WATER DISTRICT PWS | 3,728 | 2 |
| ISLAND CREEK HOMEOWNERS | 50 | 1 |
TRI Facilities (21)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Vallourec Star LP | 290.7K lbs |
| 2 | Datco Manufacturing LLC | 262.5K lbs |
| 3 | Astro Shapes LLC | 220.0K lbs |
| 4 | Whitacre Greer Co | 135.1K lbs |
| 5 | Material Sciences Corp - Canfield | 97.8K lbs |
| 6 | Trivium Aluminum Packaging Corp. USA | 74.2K lbs |
| 7 | Viasystems Technologies Corpllc | 25.1K lbs |
| 8 | Spectrum Metal Finishing | 12.4K lbs |
| 9 | Vacuform Inc. | 11.0K lbs |
| 10 | Falcon Foundry Co | 3.9K lbs |
| 11 | Mplx Terminals LLC - Youngstown Oh Terminal | 3.7K lbs |
| 12 | Environmental Specialists Inc. | 3.3K lbs |
| 13 | Xaloy LLC | 1.4K lbs |
| 14 | Sr Products | 1.2K lbs |
| 15 | Vallourec Star LP | 1.1K lbs |
| 16 | Youngstown Hard Chrome Plating & Grinding Inc. | 691 lbs |
| 17 | Qc LLC | 633 lbs |
| 18 | Commercial Metal Forming | 176 lbs |
| 19 | North Jackson Specialty Steel Llc. | 7 lbs |
| 20 | Crafco Inc. - Youngstown | 0 lbs |
| 21 | Agc Residential Fabrication - Boardman Plant | 0 lbs |
Cities in Mahoning (9)
Frequently Asked Questions
What is the environmental risk level in Mahoning, Ohio? ▼
Are there Superfund sites in Mahoning? ▼
How many toxic release facilities are in Mahoning? ▼
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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.