Koppers Inc
16 facilities · 11 states · 4.6M lbs total releases
According to the EPA Toxics Release Inventory, Koppers Inc is the reported parent of 16 Form R facilities across 11 states, disclosing 4.6M lbs of toxic releases. 11 of 92 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Michigan (2.4M lbs). Those TRI figures remain self-reported disclosure pounds for Koppers Inc, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Koppers Inc: EPA TRI 2023 reporting year
Same facilities, both years
+10.9%
13 facilities that filed in 2022 and 2023
Whole inventory
+10.9%
683.4 thousand lb → 758.1 thousand lb, every facility that filed
- Koppers Inc's total reported releases rose from 683.4 thousand lb in 2022 to 758.1 thousand lb in 2023, based on EPA TRI filings.
- Koppers Inc's water releases rose from 81 lb in 2022 to 152 lb in 2023, based on EPA TRI filings.
- Koppers Inc's off-site transfers fell from 3.6 thousand lb in 2022 to 2.2 thousand lb in 2023, based on EPA TRI filings.
- Koppers Inc's air releases rose from 679.7 thousand lb in 2022 to 755.8 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Koppers Inc from filing to facility
Largest Form R sites under this parent: Koppers Performance Chemicals; Koppers Follansbee Tar Plant; Koppers Inc; Koppers Inc. (north Little Rock Ar). Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; US Ecology Inc; Intertape Polymer Group. Largest disclosed chemicals by pounds: Ammonia; Naphthalene; Maleic anhydride; Phthalic anhydride; Creosote. Heaviest-reporting states in this extract: Michigan; West Virginia; Illinois. Industry labels on the parent rollup: Chemicals; Petroleum; Wood Products. Start from those named sites and neighbors rather than a generic parent blurb; pounds stay disclosure, not risk.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files Toxics Release Inventory (TRI) · August 2026
Largest Form R sites under this parent: Koppers Performance Chemicals; Koppers Follansbee Tar Plant; Koppers Inc; Koppers Inc. (north Little Rock Ar). Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; US Ecology Inc; Intertape Polymer Group. Largest disclosed chemicals by pounds: Ammonia; Naphthalene; Maleic anhydride; Phthalic anhydride; Creosote. Heaviest-reporting states in this extract: Michigan; West Virginia; Illinois. Industry labels on the parent rollup: Chemicals; Petroleum; Wood Products.
Koppers Inc ranks #280 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Koppers Inc spans 11 states in this extract, placing it among the broader national TRI parent footprints. Koppers Inc's disclosed pounds are spread across 16 facilities, no single site dominates the parent total in this extract.
Parent aggregation for Koppers Inc follows facility-reported names. Compare the named neighbors (Cleveland-Cliffs Inc; US Ecology Inc; Intertape Polymer Group) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Koppers Inc sits among TRI parents
Koppers Inc sits on a disclosure ladder beside Cleveland-Cliffs Inc and US Ecology Inc and Intertape Polymer Group. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Cleveland-Cliffs Inc · rank #278 · 53.0M lbs
- US Ecology Inc · rank #279 · 39.8M lbs
Lower disclosed volume
- Intertape Polymer Group · rank #281 · 4.1M lbs
Largest chemicals disclosed by Koppers Inc
Ammonia; Naphthalene; Maleic anhydride; Phthalic anhydride; Creosote lead the Form R pound rollup for this parent, including filings such as Koppers Performance Chemicals. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Ammonia | 2.4M lbs |
| Naphthalene | 986.0K lbs |
| Maleic anhydride | 258.7K lbs |
| Phthalic anhydride | 220.5K lbs |
| Creosote | 206.6K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Michigan | 1 | 2.4M lbs |
| West Virginia | 1 | 1.1M lbs |
| Illinois | 2 | 828.0K lbs |
| Arkansas | 1 | 90.3K lbs |
| Virginia | 3 | 35.9K lbs |
| Tennessee | 1 | 34.3K lbs |
| South Carolina | 3 | 24.7K lbs |
| Texas | 1 | 21.9K lbs |
| Kentucky | 1 | 16.7K lbs |
| Pennsylvania | 1 | 8.6K lbs |
| Colorado | 1 | 5.0K lbs |
Facilities (16)
| Facility | Releases |
|---|---|
| Koppers Performance Chemicals Hubbell, MI | 2.4M lbs |
| Koppers Follansbee Tar Plant Follansbee, WV | 1.1M lbs |
| Koppers Inc Cicero, IL | 797.2K lbs |
| Koppers Inc. (north Little Rock Ar) North Little Rock, AR | 90.3K lbs |
| Koppers Performance Chemcials Millington, TN | 34.3K lbs |
| Koppers Inc. (galesburg Il) Galesburg, IL | 30.9K lbs |
| Koppers Inc (somerville Tx) Somerville, TX | 21.9K lbs |
| Koppers Inc (guthrie) Guthrie, KY | 16.7K lbs |
| Koppers Inc. (florence Sc) Florence, SC | 16.3K lbs |
| Koppers Inc (roanoke) Salem, VA | 15.5K lbs |
| Atlantic Pole & Piling - Newsoms Newsoms, VA | 13.2K lbs |
| Koppers Inc (susquehanna) Montgomery, PA | 8.6K lbs |
| Carolina Pole Inc Eutawville, SC | 8.0K lbs |
| Cox Wood of Virginia Blackstone, VA | 7.2K lbs |
| Koppers Inc (denver Co) Denver, CO | 5.0K lbs |
| Koppers Performance Chemicals Inc Rock Hill, SC | 377 lbs |
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Koppers Inc on total disclosed release pounds (4.6M lbs) and reporting facility count (16). Release-volume peers include Ingredion Inc, Edison Group Cos LLC, Amsted Industries Inc. Facility-count peers include Fca US LLC, Hf Sinclair Corp, Interfor US Inc. 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 Michigan, West Virginia, Illinois; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Koppers Inc's TRI parent record
From Koppers Inc, open Koppers Performance Chemicals or compare against Cleveland-Cliffs Inc rather than reading rank alone.
- Open the largest Form R site for Koppers Inc (Koppers Performance Chemicals in MI). Largest facility
- Compare against US Ecology Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Koppers Inc sits among all slug-merged TRI parents. All parent companies
Rank and peers (Cleveland-Cliffs Inc, US Ecology Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Koppers Inc'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.