| TLTdc LLC - Westlake Plant | Westlake | LA | — | ◇ UNVERIFIED |
| TCTedia Company INC (1409030683) | Fairfield | OH | — | ◇ UNVERIFIED |
| TLTef Labs | Austin | TX | — | ◇ UNVERIFIED |
| TCTek Chemical Site | Portland | OR | — | ◇ UNVERIFIED |
| TATeknor Apex CO | Attleboro | MA | — | ◇ UNVERIFIED |
| TTeknos | Charlotte | NC | — | ◇ UNVERIFIED |
| TTerralithium | Brawley | CA | — | ◇ UNVERIFIED |
| TTTesa Tape, INC. | Sunnyvale | CA | — | ◇ UNVERIFIED |
| TRTesoro Refining and Marketing Co, LLC | Carson | CA | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley | Dumas | TX | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley INC | Fresno | CA | — | ◇ UNVERIFIED |
| TATetra Arkansas Project LLC - Tetra Arkansas Project - Evergreen Plant | Stamps | AR | — | ◇ UNVERIFIED |
| TATetra Arkansas Project LLC - Tetra Arkansas Project LLC - Evergreen #2 | Magnolia | AR | — | ◇ UNVERIFIED |
| TCTetra Chemicals | Westlake | LA | — | ◇ UNVERIFIED |
| TTTetra Technologies INC | El Dorado | AR | — | ◇ UNVERIFIED |
| TTTetra Technologies, INC. | Havertown | PA | — | ◇ UNVERIFIED |
| TCTexas City Hydrogen Carbon Monoxide Facility | Texas City | TX | — | ◇ UNVERIFIED |
| TGTexas Gulf Industries, INC. | Baltimore | MD | — | ◇ UNVERIFIED |
| TMTexas Molecular - Deer Park Services | Deer Park | TX | — | ◇ UNVERIFIED |
| TOTexas Operations | Longview | TX | — | ◇ UNVERIFIED |
| TRTextile Rubber & Chemical CO | Dalton | GA | — | ◇ UNVERIFIED |
| TPThacker Pass/kings River Valley Lithium Project | Orovada | NV | — | ◇ UNVERIFIED |
| TCThatcher Chemical of Florida INC | Palmetto | FL | — | ◇ UNVERIFIED |
 Thatcher Company of California, INC. - Stockton | Stockton | CA | — | ◇ UNVERIFIED |
| TCThatcher Company of Montana | Missoula | MT | — | ◇ UNVERIFIED |
| TAThe Andersons Marathon Holdings LLC - Greenville Plant (0819750245) | Greenville | OH | — | ◇ UNVERIFIED |
| TCThe Chemours Company | Fremont | CA | — | ◇ UNVERIFIED |
| TCThe Chemours Company | Niagara Falls | NY | — | ◇ UNVERIFIED |
| TCThe Clorox CO | Vernon | CA | — | ◇ UNVERIFIED |
| TCThe Clorox Company | Jacksonville | TX | — | ◇ UNVERIFIED |
| TCThe Clorox Company | Pleasanton | CA | — | ◇ UNVERIFIED |
| TDThe Dow Chemical Company | Deer Park | TX | — | ◇ UNVERIFIED |
| TLThe Lamotte Chemical Products Company | Chestertown | MD | — | ◇ UNVERIFIED |
| TLThe Lewis Chemical CO. | Rome | GA | — | ◇ UNVERIFIED |
| TLThe Lubrizol Corporation | El Cajon | CA | — | ◇ UNVERIFIED |
| TOTherm O Rock INC - New Eagle Plant | New Eagle | PA | — | ◇ UNVERIFIED |
| TTThe Tartaric Chemicals Corporation | Modesto | CA | — | ◇ UNVERIFIED |
| TTThe Terra Firma Company C/o Weber Logistics | Chino | CA | — | ◇ UNVERIFIED |
| TCThetford CORP | Ann Arbor | MI | — | ◇ UNVERIFIED |
| TSThomas Swan Opelika, INC. | Opelika | AL | — | ◇ UNVERIFIED |
| TCThree Creek Bioenergy | Sheffield | OH | — | ◇ UNVERIFIED |
| TRThree Rivers Biofuels LLC | Burnsville | MS | — | ◇ UNVERIFIED |
| TRThree Rivers Energy, LLC (0616010087) | Coshocton | OH | — | ◇ UNVERIFIED |
| TFTiburon Fire Protection District | Tiburon | CA | — | ◇ UNVERIFIED |
| TPTicona Polymers, INC. | Bishop | TX | — | ◇ UNVERIFIED |
| TPTiger-sul Products LLC | Stockton | CA | — | ◇ UNVERIFIED |
| TLTke LLC | Liberty | TN | — | ◇ UNVERIFIED |
| TCTokai Carbon Cb | Long Beach | CA | — | ◇ UNVERIFIED |
| TIToledo Industrial Center Company | Toledo | OH | — | ◇ UNVERIFIED |
| TPTotal Petrochemicals & Refining Usa, INC | Stratford | CT | — | ◇ UNVERIFIED |
| TPTower Product LLC | Jacksonville | FL | — | ◇ UNVERIFIED |
| TCTowne Cleaners | Rohnert Park | CA | — | ◇ UNVERIFIED |
| TFToxguard Fluid Technologies INC | Stanton | CA | — | ◇ UNVERIFIED |
| TCTrabuco Canyon Waterdistrict | Lake Forest | CA | — | ◇ UNVERIFIED |
| TITranschem Industries INC. | Fayetteville | GA | — | ◇ UNVERIFIED |
| THTrecora Hydrocarbons Silsbee | Silsbee | TX | — | ◇ UNVERIFIED |
| TITrichromatic-west, INC | Bell | CA | — | ◇ UNVERIFIED |
| TPTric Plant | Mccarran | NV | — | ◇ UNVERIFIED |
| TSTri Sect Corporation | Schaumburg | IL | — | ◇ UNVERIFIED |
| TWTrison Wells, LLC | Walterboro | SC | — | ◇ UNVERIFIED |
| TETristream Energy, LLC | Eustace | TX | — | ◇ UNVERIFIED |
| TLTronox LLC | Henderson | NV | — | ◇ UNVERIFIED |
| TSTsrc Specialty Materials R & D Lab | Katy | TX | — | ◇ UNVERIFIED |
| TCTucker's Cleaners | Dallas | TX | — | ◇ UNVERIFIED |
| TMTwelve - Moses Lake Site | Moses Lake | WA | — | ◇ UNVERIFIED |
 U-2 Clean Products, LLC | Stockbridge | GA | — | ◇ UNVERIFIED |
| ULUas Labs LLC | Wausau | WI | — | ◇ UNVERIFIED |
| UAUbe America INC. | Berkeley | CA | — | ◇ UNVERIFIED |
| USUcc Seadrift Operations | Long Mott | TX | — | ◇ UNVERIFIED |
| UHUcla Hematology Oncology Santa Monica | Santa Monica | CA | — | ◇ UNVERIFIED |
| USUdm Systems LLC | Raleigh | NC | — | ◇ UNVERIFIED |
| UAUmicore Autocat USA INC | Catoosa | OK | — | ◇ UNVERIFIED |
| UCUmicore Cobalt & Energy Products | Maxton | NC | — | ◇ UNVERIFIED |
| UPUmicore Precious Metals Chemistry (pmc) USA LLC | Catoosa | OK | — | ◇ UNVERIFIED |
| USUmicore Specialty Chemicals - Arab Facility | Arab | AL | — | ◇ UNVERIFIED |
| USUmicore Specialty Materials La - Palm Commodities International LLC | Port Allen | LA | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| UCUnelko Corporation | Phoenix | AZ | — | ◇ UNVERIFIED |
| UCUnion Carbide Brownsville | — | TX | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Lugoff | SC | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation | Woodbine | GA | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Dow Chemical CO | Institute | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide Corporation - Ucc Technology Park Operations | South Charleston | WV | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Tucker Latex Plant | Tucker | GA | — | ◇ UNVERIFIED |
| UBUnited Biochemicals LLC | Sanborn | NY | — | ◇ UNVERIFIED |
| UOUnited Organics CORP | Williamston | NC | — | ◇ UNVERIFIED |
| USUnited Stated Postal Service | San Mateo | CA | — | ◇ UNVERIFIED |
| USUnited States Doe - Savannah River Site Managed and Operated By Srns, LLC | Aiken | SC | — | ◇ UNVERIFIED |
| USUnivar Solutions Usa, LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| UBUniversal Bioenergy of North America INC | Nettleton | MS | — | ◇ UNVERIFIED |
| UPUniversal Plant Services | Pasadena | TX | — | ◇ UNVERIFIED |
| UOUniversity of Portland | Portland | OR | — | ◇ UNVERIFIED |
| ULUop LLC | Baton Rouge | LA | — | ◇ UNVERIFIED |
| UPU Payless | Long Beach | CA | — | ◇ UNVERIFIED |
| UUUrenco USA | Eunice | NM | — | ◇ UNVERIFIED |
| UEUSA Environment | Pasadena | TX | — | ◇ UNVERIFIED |
| UDUsalco/ Delta Chemical CORP | Ashtabula | OH | — | ◇ UNVERIFIED |
| ULUsalco Little Rock Plant, LLC | Little Rock | AR | — | ◇ UNVERIFIED |
| UMUsalco Michigan City Plant, LLC | Michigan City | IN | — | ◇ UNVERIFIED |
| UPUsalco Port Allen Plant LLC | Port Allen | LA | — | ◇ UNVERIFIED |
