| LILouisiana Integrated Polyethylene Jv LLC | Westlake | LA | Chemical Manufacturing325110 | 100-499 | ● ACTIVE |
| WCWestlake Chemicals & Vinyls LLC | Westlake | LA | Chemical Manufacturing325110 | 20-99 | ● ACTIVE |
Calca Solutions, LLC | Westlake | LA | Chemical Manufacturing325180 | — | ● ACTIVE |
| EUEagle US 2 LLC - Lake Charles Complex | Westlake | LA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| ECEquistar Chemicals LP - Lake Charles Polymers Site | Westlake | LA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| IVIndorama Ventures Olefin | Westlake | LA | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| LPLouisiana Pigment CO LP | Westlake | LA | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| BIBiolab INC | Westlake | LA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| HEHalliburton Energy Svcs | Westlake | LA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| LLLacc LLC US - Ethylene & Derivatives Plant | Westlake | LA | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| PIPpg Industries INC - Silica Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| CCCertainteed CORP - Lake Charles Polymer Plant | Westlake | LA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| LCLake Charles Methanol Ii LLC - Lake Charles Methanol Facility | Westlake | LA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| ALAir Liquide America CORP | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| ECEquistar Chemicals LP | Westlake | LA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| GTG2o Technologies LLC - Westlake Facility | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| LILinde INC - Westlake Compressor Facility | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC - Westlake I & Ii Facility | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| SNSasol North America INC - Lab Plant | Westlake | LA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| TLTdc LLC - Westlake Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| TCTetra Chemicals | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| BLBio Lab, Inc | Westlake | LA | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| QUQEMETICA US Silica LLC | Westlake | LA | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| WLWest Lake ASU | Westlake | LA | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| ACArch Chemicals CORP - Lake Charles Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| ACAxiall Corporation | Westlake | LA | Chemical Manufacturing325181 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC - Pelican Air Separation Unit | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| OCOlin CORP Lake Charles Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |