Koppers INC
300 N State St, Clairton, PA 15025
Operating signal within 24 months, or from a single source.
- Plant closing notice effective AUG 5, 2016 · 46 employees · filed JUN 1, 2016 · Closing — a federal source has recorded the plant since, so this notice does not set its status
Notices filed with the state under the federal WARN Act, as the state publishes them, collected by the WARN Act notices feed (CC BY 4.0). A notice records what the employer told the state; it is not by itself proof that the plant closed.
What they make
Cyclic Crude, Intermediate, and Gum and Wood Chemical Manufacturing325194Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Valley Natl Gases Wv Llc/west Mifflin | West Mifflin | All Other Petroleum and Coal Products Manufacturing 324199 | UNVERIFIED | 6.4 KM |
| Messer LLC Braddock Plt | Braddock | Industrial Gas Manufacturing 325120 | LIKELY ACTIVE | 10.2 KM |
| Univar USA INC - Bunola Facility | Bunola | Other Basic Inorganic Chemical Manufacturing 325180 | LIKELY ACTIVE | 10.0 KM |
| Air Liquide Amer Corp/donora | Donora | Industrial Gas Manufacturing 325120 | LIKELY ACTIVE | 13.4 KM |
| Dyno Nobel INC (donora Plant) | Donora | Other Basic Inorganic Chemical Manufacturing 325188 | LIKELY ACTIVE | 13.4 KM |
Also at this address
1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.
Where this record comes from
3 sources hold this plant, and 7 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
EPA cross-references this facility in RCRAINFO · EPA site type STATIONARY.
- EPA Facility Registry ServiceEXISTENCERecord 110072155447 · first seen APR 2026 · last seen APR 2026
- EPA ECHO compliance recordsOPERATINGfirst seen NOV 2024 · last seen NOV 2024
- State WARN plant-closing and layoff noticesEXISTENCEfirst seen AUG 2016 · last seen AUG 2016
IN ALLEGHENY COUNTY32 other plants share this one’s industry (Basic Chemical Manufacturing, NAICS 3251); 13 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- EPA: KOPPERS INC · OCT 2026
- Street address
- EPA: 300 N STATE ST · OCT 2026
- City
- EPA: CLAIRTON · OCT 2026
- State
- EPA: PA · OCT 2026
- County (FIPS code)
- EPA: 42003 · OCT 2026
- Coordinates
- EPA: 40.30695,-79.88639 · OCT 2026
- Hazardous waste generator (RCRA)
- EPA ECHO: none · OCT 2026