| MBMaster Builders Solutions Construction Systems US - Houston | Houston | — | ◇ UNVERIFIED |
| MAMetton America La Porte Plant | La Porte | — | ◇ UNVERIFIED |
| MCMonument Chemical Bayport LLC - Bayport Indl Complex | Pasadena | — | ◇ UNVERIFIED |
| NCNissan Chemical America Pasadena Plant | Pasadena | — | ◇ UNVERIFIED |
| OPOxiteno Pasadena Plant | Pasadena | — | ◇ UNVERIFIED |
| POPoly One CORP | Seabrook | — | ◇ UNVERIFIED |
| RBRoyal Baths Buschong Road Facility | Houston | — | ◇ UNVERIFIED |
| SFSes Foam | Spring | — | ◇ UNVERIFIED |
| SCSyntech Chemicals | Houston | — | ◇ UNVERIFIED |
| TDThe Dow Chemical - La Porte Facility | La Porte | — | ◇ UNVERIFIED |
| TVTuboscope Vetco International Plant 3 | Houston | — | ◇ UNVERIFIED |
| WEWorld Energy Biox Biofuels | Galena Park | — | ◇ UNVERIFIED |
Blue Cougar Investment LLC | Seabrook | — | ◐ LIKELY ACTIVE |
Gulf Coast Regional Blood Center | Houston | — | ◐ LIKELY ACTIVE |
Saltwerx LLC | Spring | — | ◐ LIKELY ACTIVE |
South Texas Nuclear Pharmacy, INC. | Houston | — | ◐ LIKELY ACTIVE |
| APAir Products Baytown Ii Plant | Baytown | — | ◐ LIKELY ACTIVE |
| AFAMPAC Fine Chemicals - La Porte | La Porte | 20–99 | ◐ LIKELY ACTIVE |
| AFAP Formulators - Houston | South Houston | 20–99 | ◐ LIKELY ACTIVE |
| ABArcanum Baytown Site | Baytown | — | ◐ LIKELY ACTIVE |
| AMArcot Manufacturing Corporation | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AHArkema Houston Plant | Houston | 20–99 | ◐ LIKELY ACTIVE |
| ASA Schulman La Porte | La Porte | — | ◐ LIKELY ACTIVE |
| BHBayer Houston Plant | Houston | — | ◐ LIKELY ACTIVE |
| BPBayport Polymers | Pasadena | — | ◐ LIKELY ACTIVE |
| CTCentauri Technologies LP | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| CICim Industries | Houston | — | ◐ LIKELY ACTIVE |
| CLCsa Limited, INC. | Houston | — | ◐ LIKELY ACTIVE |
| DCDixie Chemical Bayport Facility | Pasadena | — | ◐ LIKELY ACTIVE |
| EMEnterprise Morgan's Point Complex | La Porte | — | ◐ LIKELY ACTIVE |
| ECEquistar Chemicals LP - Channelview Facility | Channelview | — | ◐ LIKELY ACTIVE |
| EDEvonik Deer Park | Deer Park | 20–99 | ◐ LIKELY ACTIVE |
| EBExxonMobil Baytown Chemical Plant | Baytown | 500+ | ◐ LIKELY ACTIVE |
| FSFarouk Systems | Houston | — | ◐ LIKELY ACTIVE |
| HHouston | Houston | 100–499 | ◐ LIKELY ACTIVE |
| IVIndorama Ventures Bayport Clear Lake Site | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| ICIntergulf CORP Lonestar Ecology LLC (lonstr) | Pasadena | — | ◐ LIKELY ACTIVE |
| KAKuraray America, INC | Pasadena | — | ◐ LIKELY ACTIVE |
| LALyondellbasell Acetyls Llc, La Porte Methanol Plant | La Porte | — | ◐ LIKELY ACTIVE |
| PDPraxair Deer Park Plant | Deer Park | — | ◐ LIKELY ACTIVE |
| PIPurity Isobutylene Plant and Pasadena Terminal | Pasadena | — | ◐ LIKELY ACTIVE |
| PPPva Plant | La Porte | — | ◐ LIKELY ACTIVE |
| RPRaven Plant | Baytown | — | ◐ LIKELY ACTIVE |
| RRReichhold Reactive Polymers Division Houston Plant | Houston | — | ◐ LIKELY ACTIVE |
| STScion Technologies | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| SMSolugen Minetta Facility | Houston | — | ◐ LIKELY ACTIVE |
Southern Ionics INC | Pasadena | — | ◐ LIKELY ACTIVE |
| SQSpectrum Quality Standards | Houston | — | ◐ LIKELY ACTIVE |
| TCThe Chemours Company FC, LLC - La Porte | La Porte | 100–499 | ◐ LIKELY ACTIVE |
| ADAirgas Dry Ice | La Porte | — | ◐ LIKELY ACTIVE |