Park Ohio Holdings Corp
5 facilities · 2 states · 1.3M lbs total releases
According to the EPA Toxics Release Inventory, Park Ohio Holdings Corp is the reported parent of 5 Form R facilities across 2 states, disclosing 1.3M lbs of toxic releases. 2 of 12 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Ohio (1.3M lbs). Those TRI figures remain self-reported disclosure pounds for Park Ohio Holdings Corp, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Park Ohio Holdings Corp: EPA TRI 2023 reporting year
Same facilities, both years
-22.8%
5 facilities that filed in 2022 and 2023
Whole inventory
-22.8%
208.9 thousand lb → 161.2 thousand lb, every facility that filed
- Park Ohio Holdings Corp's total reported releases fell from 208.9 thousand lb in 2022 to 161.2 thousand lb in 2023, based on EPA TRI filings.
- Park Ohio Holdings Corp's off-site transfers fell from 208.4 thousand lb in 2022 to 160.8 thousand lb in 2023, based on EPA TRI filings.
- Park Ohio Holdings Corp's chemicals reported fell from 6 in 2022 to 5 in 2023, based on EPA TRI filings.
- Park Ohio Holdings Corp's air releases fell from 480 lb in 2022 to 422 lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Park Ohio Holdings Corp from filing to facility
Largest Form R sites under this parent: Ajax Tocco Warren Ohio Plant; Ajax Tocco Magnethermic Corp North Canton; Canton Drop Forge; Control Transformer Inc. Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; Ineos US I Inc. Largest disclosed chemicals by pounds: Mixture; Chromium; Nickel; Manganese; Copper. Heaviest-reporting states in this extract: Ohio; Indiana. Industry labels on the parent rollup: Machinery; Fabricated Metals; Electrical Equipment; Transportation Equipment. Start from those named sites and neighbors rather than a generic parent blurb; pounds stay disclosure, not risk.
Largest Form R sites under this parent: Ajax Tocco Warren Ohio Plant; Ajax Tocco Magnethermic Corp North Canton; Canton Drop Forge; Control Transformer Inc. Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; Ineos US I Inc. Largest disclosed chemicals by pounds: Mixture; Chromium; Nickel; Manganese; Copper. Heaviest-reporting states in this extract: Ohio; Indiana. Industry labels on the parent rollup: Machinery; Fabricated Metals; Electrical Equipment; Transportation Equipment.
Park Ohio Holdings Corp ranks #557 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Park Ohio Holdings Corp files across 2 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Ajax Tocco Warren Ohio Plant accounts for most of Park Ohio Holdings Corp's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Park Ohio Holdings Corp follows facility-reported names. Compare the named neighbors (Cleveland-Cliffs Inc; Ineos US I Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Park Ohio Holdings Corp sits among TRI parents
Park Ohio Holdings Corp sits on a disclosure ladder beside Cleveland-Cliffs Inc and Ineos US I Inc. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Cleveland-Cliffs Inc · rank #555 · 64.3M lbs
- Ineos US I Inc · rank #556 · 42.4M lbs
Largest chemicals disclosed by Park Ohio Holdings Corp
Mixture; Chromium; Nickel; Manganese; Copper lead the Form R pound rollup for this parent, including filings such as Ajax Tocco Warren Ohio Plant. Pound totals, not toxicity-weighted risk.
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Ohio | 4 | 1.3M lbs |
| Indiana | 1 | 0 lbs |
Facilities (5)
| Facility | Releases |
|---|---|
| Ajax Tocco Warren Ohio Plant Warren, OH | 1.3M lbs |
| Ajax Tocco Magnethermic Corp North Canton North Canton, OH | 3.0K lbs |
| Canton Drop Forge Canton, OH | 2.0K lbs |
| Control Transformer Inc Cortland, OH | 45 lbs |
| Autoform Tool & Manufacturing Angola, IN | 0 lbs |
Frequently Asked Questions
How much pollution does Park Ohio Holdings Corp release?
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Does Park Ohio Holdings Corp release carcinogens?
Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Park Ohio Holdings Corp on total disclosed release pounds (1.3M lbs) and reporting facility count (5). Release-volume peers include Mohawk Industries Inc, Mdu Resources Group Inc, Bway Holding Co. Facility-count peers include Abb Motors & Mechanical Inc, Advansix Inc, Aes Corp. Neighborhoods are forced disjoint so each axis surfaces a different set of parents.
Similar disclosed release pounds
Nearest parents (≥3 facilities, ≥10k lbs) by absolute TRI disclosed pounds, not rank-adjacent ladder neighbors.
Similar facility count
Nearest parents by reporting-site count (deduped against the release-pound neighborhood).
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are Ohio, Indiana; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Park Ohio Holdings Corp's TRI parent record
From Park Ohio Holdings Corp, open Ajax Tocco Warren Ohio Plant or compare against Cleveland-Cliffs Inc rather than reading rank alone.
- Open the largest Form R site for Park Ohio Holdings Corp (Ajax Tocco Warren Ohio Plant in OH). Largest facility
- Compare against Ineos US I Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Park Ohio Holdings Corp sits among all slug-merged TRI parents. All parent companies
Rank and peers (Cleveland-Cliffs Inc, Ineos US I Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Park Ohio Holdings Corp's record groups disclosed TRI parent-company filings so readers can compare reporting context without treating the total as a measure of risk.
Company release figures are computed directly from EPA Toxic Release Inventory data; source names and the record-linking method are documented in the methodology.
Primary sources
- EPA Toxics Release Inventory Basic Data Files - annual facility-level chemical-release disclosures
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.