| RARohm and Haas Chemicals Bayport | La Porte | 100–499 | ● ACTIVE |
| IOIneos O&p USA LLC - Battleground Manufacturing | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| BLBraskem - La Porte Plant | La Porte | — | ◐ LIKELY ACTIVE |
| DWD.b. Western - Texas | La Porte | — | ◐ LIKELY ACTIVE |
| DLDupont La Porte Plant | La Porte | — | ◐ LIKELY ACTIVE |
| KAKuraray America Vinyls | La Porte | — | ◐ LIKELY ACTIVE |
| NFNouryon Functional Chemicals LLC Battleground | La Porte | — | ◐ LIKELY ACTIVE |
| NLNovvi LLC | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| OVOxy Vinyls, LP - La Porte Vcm Plant | La Porte | — | ◐ LIKELY ACTIVE |
| PIPpg Industries INC | La Porte | — | ◐ LIKELY ACTIVE |
| SCSolvay Chemicals, INC | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| IUIneos Usa, LLC - Laporte Pao Facility | La Porte | — | ◐ LIKELY ACTIVE |
| NNoltex | La Porte | — | ◐ LIKELY ACTIVE |
| ALAir Liquide La Porte Smr | La Porte | — | ◇ UNVERIFIED |
| MAMetton America La Porte Plant | La Porte | — | ◇ UNVERIFIED |
| TDThe Dow Chemical - La Porte Facility | La Porte | — | ◇ UNVERIFIED |
| AFAMPAC Fine Chemicals - La Porte | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| ASA Schulman La Porte | La Porte | — | ◐ LIKELY ACTIVE |
| EMEnterprise Morgan's Point Complex | La Porte | — | ◐ LIKELY ACTIVE |
| LALyondellbasell Acetyls Llc, La Porte Methanol Plant | La Porte | — | ◐ LIKELY ACTIVE |
| PPPva Plant | La Porte | — | ◐ LIKELY ACTIVE |
| TCThe Chemours Company FC, LLC - La Porte | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| ADAirgas Dry Ice | La Porte | — | ◐ LIKELY ACTIVE |
| AUAirgas USA La Porte Region | La Porte | — | ◇ UNVERIFIED |
| ALAir Liquide America Specialty Gases La Porte | La Porte | — | ◇ UNVERIFIED |
| GTG20 Technologies | La Porte | — | ◇ UNVERIFIED |
| GHGemini Hdpe Unit | La Porte | — | ◇ UNVERIFIED |
| ISInvista Sa Rl - La Porte Pl Ant | La Porte | — | ◇ UNVERIFIED |
| LILaurel Industries | La Porte | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC | La Porte | — | ◇ UNVERIFIED |
| PPraxair | La Porte | — | ◇ UNVERIFIED |
| SISongwon International Americas INC. - La Porte | La Porte | — | ◇ UNVERIFIED |
South Coast Terminals Strang Road Facility | La Porte | — | ◇ UNVERIFIED |
| ZSZach System | La Porte | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, Inc- LaPorte Terminal | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| ASALTIVIA Specialty Chemicals, LLC | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| IOIneos Oligomers | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| IPIngenia Polymers Inc | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| LLLyondellBasell La Porte Complex | La Porte | 500+ | ◐ LIKELY ACTIVE |
| MCMitsubishi Chemical America - SNL | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| NNouryon | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| OPOxyVinyls-Battleground Plant | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| OPOxyVinyls-La Porte Plant | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| TDThe Dow Chemical Company - La Porte, TX | La Porte | 1–19 | ◐ LIKELY ACTIVE |
| TPTOTALENERGIES PETROCHEMICALS & REFINING USA, INC. La Porte PP | La Porte | 100–499 | ◐ LIKELY ACTIVE |
Air Liquide Large Industries U.s. LP | La Porte | — | ◇ UNVERIFIED |
| ACAltivia Chemical Complex | La Porte | — | ◇ UNVERIFIED |
| AAAmerican Acryl Pasadena | La Porte | — | ◇ UNVERIFIED |
| CCComplete Corrosion Solutions Inc. | La Porte | — | ◇ UNVERIFIED |
| DCDow Chemical | La Porte | — | ◇ UNVERIFIED |