| WCWacker Chemical Corporation | Calvert City | KY | 100–499 | ◐ LIKELY ACTIVE |
| WEWater Engineering, INC. | Mead | NE | — | ◐ LIKELY ACTIVE |
| WMWayne Manufacturing Industries, LLC | Brentwood | NH | — | ◐ LIKELY ACTIVE |
| WPWestern Plastics | Portland | TN | 20–99 | ◐ LIKELY ACTIVE |
| WCWestlake Chemicals and Vinyls, LLC | Plaquemine | LA | 100–499 | ◐ LIKELY ACTIVE |
| WEWestlake Epoxy | Lakeland | FL | 20–99 | ◐ LIKELY ACTIVE |
| WRWestlake Royal Building Products Bristol | Bristol | TN | 100–499 | ◐ LIKELY ACTIVE |
| WRWestlake Royal Building Products Marion | Marion | VA | 100–499 | ◐ LIKELY ACTIVE |
| WFWholesome Foods INC - Edinburg | Edinburg | VA | — | ◐ LIKELY ACTIVE |
| WGWR Grace - FCMS Tyrone Site | Tyrone | PA | 100–499 | ◐ LIKELY ACTIVE |
| FPFresno Precision Plastics, INC. | Clovis | CA | — | ◐ LIKELY ACTIVE |
| PBPierce Biotechnology INC | Rockford | IL | — | ◐ LIKELY ACTIVE |
| 2U2007 Union Carbide Corporation Tco | Texas City | TX | — | ◇ UNVERIFIED |
| APAccella Polyurethane Systems | Cartersville | GA | — | ◇ UNVERIFIED |
| APAccella Polyurethane Systems LLC | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| AIAc&s INC | Nitro | WV | — | ◇ UNVERIFIED |
| APAdell Polymers, INC. | Petersburg | WV | — | ◇ UNVERIFIED |
| APAdhesive Polymers Plant | Freeport | TX | — | ◇ UNVERIFIED |
| ASAdm Southport | Southport | NC | — | ◇ UNVERIFIED |
| ACAdvance Coatings Company | Westminster | MA | — | ◇ UNVERIFIED |
| AAAdvanced Architectural Products | Hamilton | MI | — | ◇ UNVERIFIED |
| AIAdvansix INC | Philadelphia | PA | — | ◇ UNVERIFIED |
| ACAfton Chemical Additives Port Arthur Facility | Port Arthur | TX | — | ◇ UNVERIFIED |
| ACAgilyx Corporation | Tigard | OR | — | ◇ UNVERIFIED |
| APAg Processing, INC. Algona Methyl Ester Processing | Algona | IA | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, INC. | Carson | CA | — | ◇ UNVERIFIED |
| ANAkzo Nobel Coatings INC | Columbus | OH | — | ◇ UNVERIFIED |
| ANAkzo Nobel Coatings INC. | Huron | OH | — | ◇ UNVERIFIED |
| ANAkzo Nobel Polymer Chemicals | Pasadena | TX | — | ◇ UNVERIFIED |
| ACAlbemarle Corporation | Orangeburg | SC | — | ◇ UNVERIFIED |
| ACAldrich Chemical Company, Inc.-teutonia | Milwaukee | WI | — | ◇ UNVERIFIED |
| ATAllcoat Technology | Wilmington | MA | — | ◇ UNVERIFIED |
| AIAllen Industries LLC | Sedalia | MO | — | ◇ UNVERIFIED |
| AUAllnex USA INC | East Saint Louis | IL | — | ◇ UNVERIFIED |
| ABAlon Bakersfield Refinery | Bakersfield | CA | — | ◇ UNVERIFIED |
| AUAlon USA Refinery | Big Spring | TX | — | ◇ UNVERIFIED |
| AGAlpha General Services, LLC | Sebring | FL | — | ◇ UNVERIFIED |
| ARAlpha Resins, LLC | Detroit | MI | — | ◇ UNVERIFIED |
| APAlta Performance Materials Fka Ineos | Bartow | FL | — | ◇ UNVERIFIED |
| APAlta Performance Materials Us, LLC. | Fort Smith | AR | — | ◇ UNVERIFIED |
| ACAlto Columbia, LLC | Boardman | OR | — | ◇ UNVERIFIED |
| ALAltugulas LLC | Louisville | KY | — | ◇ UNVERIFIED |
| ACAmbit Chemical Technologies | Gulfport | MS | — | ◇ UNVERIFIED |
| ASAmericas Styrenics Allyns Point Plant | Gales Ferry | CT | — | ◇ UNVERIFIED |
| ASAmericas Styrenics LLC | Marietta | OH | — | ◇ UNVERIFIED |
| ASAmericas Styrenics LLC - St James Plant | Saint James | LA | — | ◇ UNVERIFIED |
| AIAmerichem INC Cnc | Concord | NC | — | ◇ UNVERIFIED |
| AIAmerichem INC. - Liberty Plant | Liberty | NC | — | ◇ UNVERIFIED |
| ASAmerichem Sales CORP | Mason | MI | — | ◇ UNVERIFIED |
| APAmetek/westchester Plastics Div | Nesquehoning | PA | — | ◇ UNVERIFIED |
| ACAmfine Chemical CORP | Hopkinsville | KY | — | ◇ UNVERIFIED |
| ACAmpacet CORP - Plastic Processing Plant | Deridder | LA | — | ◇ UNVERIFIED |
| ASAm Stabilizers | Franklin | PA | — | ◇ UNVERIFIED |
| ALAmt Labs INC | North Salt Lake | UT | — | ◇ UNVERIFIED |
| ACAmvac Chemical Corporation, Axis Plant | Axis | AL | — | ◇ UNVERIFIED |
| APAnchor Packaging-marmaduke | Marmaduke | AR | — | ◇ UNVERIFIED |
| ALAoc, LLC | Perris | CA | — | ◇ UNVERIFIED |
| ALAoc L L C Tennessee Plant | Collierville | TN | — | ◇ UNVERIFIED |
| ATAoc Trusted Solutions | Valparaiso | IN | — | ◇ UNVERIFIED |
| APApg Polytech, Llc, Apple Grove Plant | Apple Grove | WV | — | ◇ UNVERIFIED |
| ACApollo Chemical | Burlington | NC | — | ◇ UNVERIFIED |
| AMApplied Material Solutions, INC. | Burlington | WI | — | ◇ UNVERIFIED |
| AIAprm INC | Houston | TX | — | ◇ UNVERIFIED |
| ACAqua Clean Environmental of Virginia | Richmond | VA | — | ◇ UNVERIFIED |
| AUArchroma US INC Martin Plant | Martin | SC | — | ◇ UNVERIFIED |
| AEArcwood Environmental LLC - B-4000 | Orange | TX | — | ◇ UNVERIFIED |
| ARArdmore Refinery | Ardmore | OK | — | ◇ UNVERIFIED |
| ACArizona Chemical Company, LLC | Dover | OH | — | ◇ UNVERIFIED |
| ACArkema Coating Resins | Alsip | IL | — | ◇ UNVERIFIED |
| ACArkema Coating Resins | Kansas City | MO | — | ◇ UNVERIFIED |
| AIArkema INC | Courtland | VA | — | ◇ UNVERIFIED |
| AIArkema INC | Pasadena | TX | — | ◇ UNVERIFIED |
| AIArkema INC | Piffard | NY | — | ◇ UNVERIFIED |
| AIArkema INC | Torrance | CA | — | ◇ UNVERIFIED |
| AIArkema INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| AIArkema INC | Chatham | VA | — | ◇ UNVERIFIED |
| AIArkema INC | Blooming Prairie | MN | — | ◇ UNVERIFIED |
| AIArkema INC. | Bristol | PA | — | ◇ UNVERIFIED |
| AIArkema INC - Arkema Emulsion Systems | Hahnville | LA | — | ◇ UNVERIFIED |
| AIArkema INC. - Beaumont Plant | Beaumont | TX | — | ◇ UNVERIFIED |
| AEArnette Enterprises INC | Richmond | MO | — | ◇ UNVERIFIED |
| APArnette Polymers LLC | Richmond | MO | — | ◇ UNVERIFIED |
| APArrmaz Products INC. | Mulberry | FL | — | ◇ UNVERIFIED |
| ALArrowstar, LLC | Dalton | GA | — | ◇ UNVERIFIED |
| ARArtesia Refinery | Artesia | NM | — | ◇ UNVERIFIED |
| ALArxada LLC | Williamsport | PA | — | ◇ UNVERIFIED |
 Asahi Kasei Plastics North America, INC. (n6707) | Fowlerville | MI | — | ◇ UNVERIFIED |
| APAscend (decatur Plant) | Decatur | AL | — | ◇ UNVERIFIED |
| APAscend Performance Materials Operations LLC | Greenwood | SC | — | ◇ UNVERIFIED |
| ASA Schulman INC | Bellevue | OH | — | ◇ UNVERIFIED |
| ACAshland Chemical Company | Savannah | GA | — | ◇ UNVERIFIED |
| ANAshland Neal Plant | Kenova | WV | — | ◇ UNVERIFIED |
| ASAshland Specialty Chemical CO | Jacksonville | AR | — | ◇ UNVERIFIED |
| ASAshland Specialty Chemical CO. -calumet City, Il | Calumet City | IL | — | ◇ UNVERIFIED |
| ASAshland Specialty Chemical Company | Commerce | CA | — | ◇ UNVERIFIED |
| ASAshland Specialty Chemical Co.- Neville Island, Pa | Pittsburgh | PA | — | ◇ UNVERIFIED |
| ASAshland Specialty Ingredients (parlin Plant) | Parlin | NJ | — | ◇ UNVERIFIED |
| ACAsk Chemicals LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| ACAstro Chemicals | Springfield | MA | — | ◇ UNVERIFIED |
| ASAthlon Solutions Bayport Facility | Pasadena | TX | — | ◇ UNVERIFIED |
