| SSSekisui Specialty Chemicals America LLC. - Pasadena Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| SCShell Chemical Appalachia LLC | Monaca | PA | — | ◇ UNVERIFIED |
| SCShell Chemical LP - Geismar Plant | Geismar | LA | — | ◇ UNVERIFIED |
| SSShinetsu Silicones of America - Freeport Plant | Freeport | TX | — | ◇ UNVERIFIED |
| SGSi Group INC Tx Operations | Freeport | TX | — | ◇ UNVERIFIED |
| SSSolvay Specialty Polymers USA | Borger | TX | — | ◇ UNVERIFIED |
| SSSolvay Specialty Polymers USA - Ryton Facility | Borger | TX | — | ◇ UNVERIFIED |
| SUSolvay USA INC | Spartanburg | SC | — | ◇ UNVERIFIED |
| SCStepan Company | Anaheim | CA | — | ◇ UNVERIFIED |
| SAStyrolution America LLC | Texas City | TX | — | ◇ UNVERIFIED |
| SCSunbelt Corporation | Rock Hill | SC | — | ◇ UNVERIFIED |
 Sun Chemical CORP Color Intermediates | Cincinnati | OH | — | ◇ UNVERIFIED |
| TATenneco Automotive - Monroe Clevite Elastomers (0322000048) | Milan | OH | — | ◇ UNVERIFIED |
| TCTexas City Crude Oil Terminal | Texas City | TX | — | ◇ UNVERIFIED |
| TPTexas Petrochemicals | Houston | TX | — | ◇ UNVERIFIED |
| TDThe Dow Chemical CO - Louisiana Operations | Plaquemine | LA | — | ◇ UNVERIFIED |
| TDThe Dow Chemical Company U.s.a., Midland | Midland | MI | — | ◇ UNVERIFIED |
| TDThe Dow Chemical - La Porte Facility | La Porte | TX | — | ◇ UNVERIFIED |
| TWThe Whitaker Company | Ocoee | FL | — | ◇ UNVERIFIED |
| TPTotalenergies Petrochemicals & Refining USA INC - Cos-mar Styrene Monomer Plant | Carville | LA | — | ◇ UNVERIFIED |
| TPTotal Petrochemicals Usa, INC. Bayport Hdpe Plant | Pasadena | TX | — | ◇ UNVERIFIED |
| TETownley Engineering & Manufacturing CO | Ocala | FL | — | ◇ UNVERIFIED |
| TCTrans Chemical Corp-trans Chemical CORP | Saint Louis | MO | — | ◇ UNVERIFIED |
| THTrecora Hydrocarbons Combined Facility | Silsbee | TX | — | ◇ UNVERIFIED |
| TITrical INC | Hollister | CA | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation, Institute Plant | Institute | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP -so Charleston Fac. | South Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP - St Charles Plant | Hahnville | LA | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Technology Park | Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide Seadrift Cogen | Seadrift | TX | — | ◇ UNVERIFIED |
| UTUnivation Technologies LLC - Catalyst Plant | South Charleston | WV | — | ◇ UNVERIFIED |
| VRValero Renewable Fuels Company | Aurora | SD | — | ◇ UNVERIFIED |
| VSVictoria Site | Victoria | TX | — | ◇ UNVERIFIED |
| VPVisual Pak American Blending | Waukegan | IL | — | ◇ UNVERIFIED |
| VPVoranol_specialty Polyurethane Chemicals (spc) | Freeport | TX | — | ◇ UNVERIFIED |
| VRVp Racing Fuels Fulfillment Center | Huntingdon | TN | — | ◇ UNVERIFIED |
| WCWayne County Rubber INC. | Wooster | OH | — | ◇ UNVERIFIED |
| WCWestlake Chemicals & Vinyls LLC - Plaquemine Facility | Plaquemine | LA | — | ◇ UNVERIFIED |
| WNWestlake Natrium Llc, Westlake Natrium | Proctor | WV | — | ◇ UNVERIFIED |
| WPWestlake Petrochemical LP | Sulphur | LA | — | ◇ UNVERIFIED |
| WPWestlake Polymers Corp, Poly 1 & 2 | Sulphur | LA | — | ◇ UNVERIFIED |
| WVWestlake Vinyls CO LP - Geismar Facility | Geismar | LA | — | ◇ UNVERIFIED |
| WLWsp Lock Haven Manufacturing Facility | Castanea | PA | — | ◇ UNVERIFIED |
| WPWynn's Precision, INC. | Lebanon | TN | — | ◇ UNVERIFIED |
| ZCZeon Chemicals LP | Hattiesburg | MS | — | ◇ UNVERIFIED |
| ASAirBoss Silicone LLC | Auburn Hills | MI | 1–19 | ◐ LIKELY ACTIVE |
| AArchwood | Akron | OH | 20–99 | ◐ LIKELY ACTIVE |
| AOARLANXEO, Orange Site, Texas | Orange | TX | 100–499 | ◐ LIKELY ACTIVE |
| BCBASF Corporation Plant 1 | Chattanooga | TN | 20–99 | ◐ LIKELY ACTIVE |
| BCBASF Corporation Plant 2 | Chattanooga | TN | 20–99 | ◐ LIKELY ACTIVE |
