Monument Chemical Port Arthur, LLC | Port Arthur | TX | Chemical Manufacturing325110 | 20-99 | ● ACTIVE |
| PAPort Arthur Refinery | Port Arthur | TX | Petroleum and Coal Products Manufacturing324110 | 20-99 | ● ACTIVE |
| BTBasf Totalenergies Petrochemicals LLC | Port Arthur | TX | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| PAPort Arthur Plant | Port Arthur | TX | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| DGDiamond Green Diesel | Port Arthur | TX | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PPPraxair - Port Arthur, Tx | Port Arthur | TX | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| ACAfton Chemical Additives Port Arthur Facility | Port Arthur | TX | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PAPort Arthur Plant | Port Arthur | TX | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| PPPraxair Port Arthur Hydrogen Facility | Port Arthur | TX | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| BTBASF TotalEnergies Petrochemical LLC | Port Arthur | TX | Chemical Manufacturing325110 | 100-499 | ◐ LIKELY ACTIVE |
| MCMotiva Chemicals LLC | Port Arthur | TX | Chemical Manufacturing325110 | 100-499 | ◐ LIKELY ACTIVE |
| COCrt Oil | Port Arthur | TX | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| PAPort Arthur Facility | Port Arthur | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| PAPort Arthur Plant | Port Arthur | TX | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| PAPort Arthur Plant | Port Arthur | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| SCSulzer Chemtech USA | Port Arthur | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |