| 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 | Pleasanton | CA | — | ◇ UNVERIFIED |
| TCThe Clorox Company | Jacksonville | TX | — | ◇ 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 |
