| TNTeMa North America LLC | Kearneysville | WV | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TDThe Dow Chemical Company Hayward Site | Hayward | CA | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TDThe Dow Chemical Company-Kankakee, IL | Kankakee | IL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TRThe Rogers Manufacturing Company | Rockfall | CT | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TPT&H Plastics, Inc. | Houston | TX | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| TITjw INC | San Dimas | CA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| TPTOTALENERGIES PETROCHEMICALS & REFINING USA, INC. Carville PS | Carville | LA | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| TPTOTALENERGIES PETROCHEMICALS & REFINING USA, INC. La Porte PP | La Porte | TX | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| TMTrillium Marketing, INC | Harbor Springs | MI | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| TETrinseo Exton Global Innovation Center | Exton | PA | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
Universal Plastics Albany | Howes Cave | NY | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| UIUSA IL Marengo Plant | Marengo | IL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| UMUSA MD Hagerstown Plant | Williamsport | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| UAU.S. Amines (Bucks) LLC | Bucks | AL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| UOUSA OR Woodburn Plant | Woodburn | OR | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| USUSA SC Chester Plant | Chester | SC | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| UCUS CA Los Angeles Plant | Los Angeles | CA | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| VMValerian Materials INC. | Minneapolis | MN | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| VPValley Park Facility | Valley Park | MO | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| WWallingford | Wallingford | CT | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| WWWashington Works | Washington | WV | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| WWestlake | Geismar | LA | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| WCWestlake Chemical Corporation Aberdeen Facility | Aberdeen | MS | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| WEWestlake Epoxy Bedford Park (Argo) Illinois | Bedford Park | IL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| WEWestlake Epoxy Deer Park Texas | Deer Park | TX | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| WSWinona Site Ticona Polymers Inc. | Winona | MN | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| XHXerxes Hagerstown | Williamsport | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| XHXerxes Hagerstown | Williamsport | MA | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| LILow Impact Technologies Usa, INC | Fletcher | NC | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| PLPurolite LLC | King of Prussia | PA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |