| RARoyal Adhesives & Sealants LLC | Mansfield | — | ◇ UNVERIFIED |
| RBRoyal Baths Manufacturing CO | Richland Hills | — | ◇ UNVERIFIED |
| RCRtp Company Crockett | Crockett | — | ◇ UNVERIFIED |
| RCRuss Chemical | Odessa | — | ◇ UNVERIFIED |
| SSachem | Austin | — | ◇ UNVERIFIED |
| SPSaginaw Plant | Saginaw | — | ◇ UNVERIFIED |
| SSchnee-morehead | Irving | — | ◇ UNVERIFIED |
| SHScotts Hyponex Tyler | Tyler | — | ◇ UNVERIFIED |
| SCSelect Chemicals, LTD. | Yorktown | — | ◇ UNVERIFIED |
| SSSf Sulfur | Freeport | — | ◇ UNVERIFIED |
| SRSgr Railyard | San Patricio | — | ◇ UNVERIFIED |
| SNSgs North America | Deer Park | — | ◇ UNVERIFIED |
| SASherwin Alumina Plant | Ingleside | — | ◇ UNVERIFIED |
| SCShrieve Chemical Services | Marlin | — | ◇ UNVERIFIED |
| SCSmith Corrosion Services Incorporated | Houston | — | ◇ UNVERIFIED |
| SRSocomore - Rhome | Rhome | — | ◇ UNVERIFIED |
| SSSolvay Specialty Polymers USA | Borger | — | ◇ UNVERIFIED |
| SUSolvay USA Midland | Midland | — | ◇ UNVERIFIED |
| SISongwon International Americas INC. - La Porte | La Porte | — | ◇ UNVERIFIED |
| SLSour Lake Olefins | Sour Lake | — | ◇ UNVERIFIED |
 South Coast Terminals Strang Road Facility | La Porte | — | ◇ UNVERIFIED |
| SUSouthern Union Gas Services LTD Emperor | Kermit | — | ◇ UNVERIFIED |
| STSouth Texas Chlorine, INC. | Harlingen | — | ◇ UNVERIFIED |
| SPSovereign Pharmaceuticals | Fort Worth | — | ◇ UNVERIFIED |
| SPSovereign Pharmaceuticals | Fort Worth | — | ◇ UNVERIFIED |
| SCSpecialty Coatings CORP | Arlington | — | ◇ UNVERIFIED |
| SCSrw Cogeneration, L.p. | Orange | — | ◇ UNVERIFIED |
| SCStarpak CORP | Houston | — | ◇ UNVERIFIED |
| SPStp Products Manufacturing | Garland | — | ◇ UNVERIFIED |
| SPStreamline Polymers | Houston | — | ◇ UNVERIFIED |
| SCSunbelt Chemicals | Dallas | — | ◇ UNVERIFIED |
 Sun Chemical CORP Grand Pairie Plant | Grand Prairie | — | ◇ UNVERIFIED |
| SPSun Products Corporation Texas | Pasadena | — | ◇ UNVERIFIED |
| SUSyensqo USA LLC | Pasadena | — | ◇ UNVERIFIED |
| SSylvania | Fort Worth | — | ◇ UNVERIFIED |
 Syngenta Crop Protection - Bay Port Site | Pasadena | — | ◇ UNVERIFIED |
| SCSyntech Cedar Port | Baytown | — | ◇ UNVERIFIED |
| SASynthomer Adhesive Tehcnologies Eastoflex and East | Longview | — | ◇ UNVERIFIED |
| TLTdc Llc-corpus Christi Plant | Corpus Christi | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley INC | Pasadena | — | ◇ UNVERIFIED |
| TFTexas Fluorescence Laboratories | Austin | — | ◇ UNVERIFIED |
| TGThe Geon Company | Deer Park | — | ◇ UNVERIFIED |
| TSThe Sherwin-williams | Arlington | — | ◇ UNVERIFIED |
| TPTicona Polymers, INC. | Bishop | — | ◇ UNVERIFIED |
| TSTitan Specialties LTD | Milford | — | ◇ UNVERIFIED |
| TCTotal Clean Pasadena Tank Wash | Pasadena | — | ◇ UNVERIFIED |
| TITrinkote Industrial Finishes | Cresson | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucar Emulsion Systems | Garland | — | ◇ UNVERIFIED |
| UEUnited Elchem Industries | Dallas | — | ◇ UNVERIFIED |
| USUnited Salt Corporation | Missouri City | — | ◇ UNVERIFIED |
