| WPWaste Path Sanitary Landfill LLC | Calvert City | KY | — | ◐ LIKELY ACTIVE |
| WVWest Virginia Methanol, Inc, Pleasants County | Saint Marys | WV | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO Conn | Columbia | MD | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO - Conn - Super High Activity Catalyst Plant | Norco | LA | — | ◐ LIKELY ACTIVE |
| 2120 10 Products Incorporated | Salem | OR | — | ◇ UNVERIFIED |
| 3C3f Chimica Americas INC | Charlotte | NC | — | ◇ UNVERIFIED |
| 5P5n Plus CORP | Windsor | WI | — | ◇ UNVERIFIED |
| ALAbf Laboratories | Waukegan | IL | — | ◇ UNVERIFIED |
| ATAbsorbent Technologies | Albany | OR | — | ◇ UNVERIFIED |
| ASAb Specialty Silicones | Waukegan | IL | — | ◇ UNVERIFIED |
| ACAcc Coatings CORP | Middlesex | NJ | — | ◇ UNVERIFIED |
| AMAccu-tronics Manufacturing INC | White Bear Lake | MN | — | ◇ UNVERIFIED |
| AIAc&s, Inc., Nitro | Nitro | WV | — | ◇ UNVERIFIED |
| ABAditya Birla Chemicals (usa), INC. | Dalton | GA | — | ◇ UNVERIFIED |
| ADAdm Development Products | Decatur | IL | — | ◇ UNVERIFIED |
| ABAdvanced Biotech @ 85 5th Ave Complex | Paterson | NJ | — | ◇ UNVERIFIED |
| AEAdvanced Environmental Options INC | Spartanburg | SC | — | ◇ UNVERIFIED |
| ADAes Drilling Fluids Pleasanton Warehouse | Pleasanton | TX | — | ◇ UNVERIFIED |
| ACAfton Chemical Additives Port Arthur Facility | Port Arthur | TX | — | ◇ UNVERIFIED |
| ATAgilent Technologies, INC. | North Kingstown | RI | — | ◇ UNVERIFIED |
 Airgas Specialty Products - Granite City | Granite City | IL | — | ◇ UNVERIFIED |
| APAir Products & Chemicals INC | Pace | FL | — | ◇ UNVERIFIED |
| ACAkcros Chemicals INC | New Brunswick | NJ | — | ◇ UNVERIFIED |
| ANAkzo Nobel Surface Chemistry LLC | Mccook | IL | — | ◇ UNVERIFIED |
| ABAlabama Bioenergy LLC. | Bridgeport | AL | — | ◇ UNVERIFIED |
| ACAlbemarle Corporation | Orangeburg | SC | — | ◇ UNVERIFIED |
| AAlchem | Mentor | OH | — | ◇ UNVERIFIED |
 Alchem Laboratories Corporation | Alachua | FL | — | ◇ UNVERIFIED |
| AMAlcoa Micromill | Sparks | NV | — | ◇ UNVERIFIED |
| ADAlden Div of Mrc | West Springfield | MA | — | ◇ UNVERIFIED |
| ACAldrich Chemical CO INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| ACAldrich Chemical CO INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| ASAlkemin S De R L De C V | Sahuarita | AZ | — | ◇ UNVERIFIED |
| ACAllied Chemical & Ironton Coke | Ironton | OH | — | ◇ UNVERIFIED |
| AUAllied Universal CORP | Ranger | GA | — | ◇ UNVERIFIED |
| ALAlpont LLC | Oregon | OH | — | ◇ UNVERIFIED |
| AIAlsco INC. - Doraville Facility | Atlanta | GA | — | ◇ UNVERIFIED |
| AAmcor | Medina | OH | — | ◇ UNVERIFIED |
| ABAmerican Biodiesel INC Dba Community Fuels | Stockton | CA | — | ◇ UNVERIFIED |
| ABAmerican Blending and Filling | Waukegan | IL | — | ◇ UNVERIFIED |
| ACAmerican Chemical LLC | Portage | UT | — | ◇ UNVERIFIED |
| AFAmerican Future Fuels Facility | Lima | OH | — | ◇ UNVERIFIED |
| AWAmerican Warehouses, LTD. | Houston | TX | — | ◇ UNVERIFIED |
| AMAmrep Manufacturing Company LLC | Ontario | CA | — | ◇ UNVERIFIED |
| ASAm Stabilizers | Franklin | PA | — | ◇ UNVERIFIED |
| AIAnm, INC | Medford | OR | — | ◇ UNVERIFIED |
| AMApex Metal Finishing-apex Metal Finishing | Saint Louis | MO | — | ◇ UNVERIFIED |
 Applied Biosystems, LLC | Foster City | CA | — | ◇ UNVERIFIED |
| AMApplied Material Solutions, INC. | Burlington | WI | — | ◇ UNVERIFIED |
| ASApplied Silicone Corportation | Santa Paula | CA | — | ◇ UNVERIFIED |
