Westlake Compounds LLC

What they make

Where it is

Other plants nearby

No other listed facility within 40 km shares this one’s four-digit industry code, or this record has no coordinates to measure from.

Also at this address

No other federal record shares this street address.

Where this record comes from

4 sources hold this plant, and 8 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 AIR, AIRS/AFS, MS-ENSITE, NPDES, RCRAINFO, TRIS · EPA site type STATIONARY.

• OSHA injury and illness reportsOPERATING
  Record 796054 · first seen DEC 2025 · last seen DEC 2025
• EPA ECHO compliance recordsOPERATING
  first seen DEC 2025 · last seen DEC 2025
• EPA Toxics Release InventoryOPERATING
  first seen DEC 2024 · last seen DEC 2024
• EPA Facility Registry ServiceEXISTENCE
  Record 110000590655 · first seen OCT 2016 · last seen MAR 2018

IN COPIAH COUNTY1 other plant shares this one’s industry (Other Chemical Product and Preparation Manufacturing, NAICS 3259); 0 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: WESTLAKE COMPOUNDS LLC · OCT 2026

Street address

EPA: 20043 HWY 51 · OCT 2026

City

EPA: HAZLEHURST · OCT 2026

State

EPA: MS · OCT 2026

County (FIPS code)

EPA: 28029 · OCT 2026

Coordinates

EPA: 31.92565,-90.39357 · OCT 2026

Employees (band)

OSHA: 100-499 · DEC 2025

Hazardous waste generator (RCRA)

EPA ECHO: VSQG · OCT 2026