| CLCbi Laboratories | Fort Worth | — | ◇ UNVERIFIED |
| CLCelanese Limited | Corpus Christi | — | ◇ UNVERIFIED |
| CLCelanese LTD | Pampa | — | ◇ UNVERIFIED |
| CEChase Elastomer a Hexpol Company | Kennedale | — | ◇ UNVERIFIED |
| C3Chem 32 | West Orange | — | ◇ UNVERIFIED |
| CRChemical Recovery Technologies LLC | Port Arthur | — | ◇ UNVERIFIED |
| CSChemical Specialties INC | Freeport | — | ◇ UNVERIFIED |
| CSChemical Specialty Plant | Beaumont | — | ◇ UNVERIFIED |
| CIChempak International | Houston | — | ◇ UNVERIFIED |
| CHChemstation Houston LLC | Houston | — | ◇ UNVERIFIED |
| CIChryso, INC. | Royse City | — | ◇ UNVERIFIED |
| CEClean Energy Texas Lng | Willis | — | ◇ UNVERIFIED |
| CCCliffside Crude Helium Enrichment Unit | Amarillo | — | ◇ UNVERIFIED |
| CPClorox Prods Mfg CO | Houston | — | ◇ UNVERIFIED |
| CPComposite Product Division Freeport | Freeport | — | ◇ UNVERIFIED |
| CCCook Composites & Polymers CO | Arlington | — | ◇ UNVERIFIED |
| CFCorteva Freeport Operations | Freeport | — | ◇ UNVERIFIED |
| CFCorteva Freeport Operations | Freeport | — | ◇ UNVERIFIED |
| CBCraig Baker Marble CO INC | Barker | — | ◇ UNVERIFIED |
| CPCst Performance Products CORP. Plant 7001 | Conroe | — | ◇ UNVERIFIED |
| DCDallas Chemical Techs INC | Houston | — | ◇ UNVERIFIED |
| DPDeer Park Plant | Deer Park | — | ◇ UNVERIFIED |
| DCDegussa Construction Chemicals Ops INC | Lancaster | — | ◇ UNVERIFIED |
| DRDelek Renewables LLC | Cleburne | — | ◇ UNVERIFIED |
| DPDfb Pharmaceuticals | Brooks City Base | — | ◇ UNVERIFIED |
| DPDiversified Pure Chem | Rhome | — | ◇ UNVERIFIED |
| DPDon-nan Pump and Supply | Temple | — | ◇ UNVERIFIED |
| DKDorf Ketal Energy Services | Midland | — | ◇ UNVERIFIED |
| DLDpt Laboratories | Brooks City Base | — | ◇ UNVERIFIED |
| DPDu Pont Dallas Refinish Service Center | Dallas | — | ◇ UNVERIFIED |
 Eastman Chemical Tyler Terminal | Tyler | — | ◇ UNVERIFIED |
| EVEast Vealmoor Gas Plant | Coahoma | — | ◇ UNVERIFIED |
| EEEffective Environmental - Corsicana Plant | Corsicana | — | ◇ UNVERIFIED |
| EEEffective Environmental - Pasadena Facility | Pasadena | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours | Houston | — | ◇ UNVERIFIED |
| EElementis | Amarillo | — | ◇ UNVERIFIED |
| EPEl Paso Pvc | El Paso | — | ◇ UNVERIFIED |
| ETElt Trex Properties | Arlington | — | ◇ UNVERIFIED |
| EFEnnis Flint North | Ennis | — | ◇ UNVERIFIED |
| EPEnnis Paint South Plant | Ennis | — | ◇ UNVERIFIED |
| ECEquistar Chocolate Bayou Polymers Plant | Alvin | — | ◇ UNVERIFIED |
| ECEthyl Corporation | Pasadena | — | ◇ UNVERIFIED |
| EPEvonik Pasadena | Pasadena | — | ◇ UNVERIFIED |
| ETExide Technologies Frisco Recycling Center | Frisco | — | ◇ UNVERIFIED |
| ECExxon Chemical Americas Houston Chemical Plant | Houston | — | ◇ UNVERIFIED |
| FUFaci USA Industrial | Lufkin | — | ◇ UNVERIFIED |
| FSFarouk Systems Richy Rd Warehouse | Houston | — | ◇ UNVERIFIED |
| FEFini Enterprises Incorporated | Celina | — | ◇ UNVERIFIED |
| FIFlomin INC | Baytown | — | ◇ UNVERIFIED |
| FPFluoromed Products, L.p. | Round Rock | — | ◇ UNVERIFIED |
