| ABAdvanced Biotech | Oneonta | NY | — | ◇ UNVERIFIED |
| ABAdvanced Biotech @ 85 5th Ave Complex | Paterson | NJ | — | ◇ UNVERIFIED |
| AEAdvanced Environmental Options INC | Spartanburg | SC | — | ◇ UNVERIFIED |
| ACAdvancion Corporation - Sterlington Plant | Sterlington | LA | — | ◇ UNVERIFIED |
| AGAdvario Galveston County, LLC | Texas City | TX | — | ◇ UNVERIFIED |
| ALAdvenchen Laboratories LLC | Moorpark | CA | — | ◇ UNVERIFIED |
| AIAequor INC | San Diego | CA | — | ◇ UNVERIFIED |
| AGAerojet General Corporation | Bakersfield | CA | — | ◇ UNVERIFIED |
| ADAes Drilling Fluids Clinton | Clinton | OK | — | ◇ UNVERIFIED |
| ADAes Drilling Fluids Pleasanton Warehouse | Pleasanton | TX | — | ◇ UNVERIFIED |
| AEAffinity Energy Solutions INC. | Rosharon | TX | — | ◇ UNVERIFIED |
| ACAfton Chemical Corporation Dba Costco | Simi Valley | CA | — | ◇ UNVERIFIED |
| AUAgrium U.s. INC. | Florence | AL | — | ◇ UNVERIFIED |
| AUAgrium US INC - Chesapeake Plant | Chesapeake | VA | — | ◇ UNVERIFIED |
| ATAig Technical Services | Redding | CA | — | ◇ UNVERIFIED |
| APAir Products and Chemicals Inc-j.p. Stevens Piedmont Site-remediation Project | Piedmont | SC | — | ◇ UNVERIFIED |
| APAir Products Manufacturing LLC | Paramount | CA | — | ◇ UNVERIFIED |
| AHAjinomoto Health & Nutrition North America, INC. | Eddyville | IA | — | ◇ UNVERIFIED |
| ACAkcros Chemicals INC | New Brunswick | NJ | — | ◇ UNVERIFIED |
| ANAkzo Nobel Surface Chemistry LLC | Salisbury | NC | — | ◇ UNVERIFIED |
| ANAkzo Nobel Surface Chemistry LLC | Mccook | IL | — | ◇ UNVERIFIED |
| ATAlbany Terminal | Albany | NY | — | ◇ UNVERIFIED |
 Alchem Laboratories Corporation | Alachua | FL | — | ◇ UNVERIFIED |
| ACAldrich Chemical CO INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| ACAldrich Chemical CO INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| AIAlexium INC | Duncan | SC | — | ◇ UNVERIFIED |
| APAli Pharmaceutical Mfg LLC | Omaha | NE | — | ◇ UNVERIFIED |
| AUAllied Universal Corporation | Fort Pierce | FL | — | ◇ UNVERIFIED |
| AIAllnex INC | North Augusta | SC | — | ◇ UNVERIFIED |
| AMAlpont Methanol | Oregon | OH | — | ◇ UNVERIFIED |
| ALAlyeschem, LLC / Alyeschem Methanol Plant | North Slope Borough | AK | — | ◇ UNVERIFIED |
| ALAlzchem LLC | Fresno | CA | — | ◇ UNVERIFIED |
| ACAmerchol CORP | Greensburg | LA | — | ◇ UNVERIFIED |
| AAAmerican Acryl | Pasadena | TX | — | ◇ UNVERIFIED |
 American Aerogel Corporation | Rochester | NY | — | ◇ UNVERIFIED |
| ACAmerican Contract Systems, INC. | Temple Terrace | FL | — | ◇ UNVERIFIED |
| AFAmerican Future Fuels Facility | Lima | OH | — | ◇ UNVERIFIED |
| ARAmerican River Nutrition LLC | Hadley | MA | — | ◇ UNVERIFIED |
| AWAmerican Warehouses, LTD. | Houston | TX | — | ◇ UNVERIFIED |
| AAminoacids.com | Roseville | MN | — | ◇ UNVERIFIED |
| APAmmonium Phosphate Fertilizer Spill on Hwy 90 | Moses Lake | WA | — | ◇ UNVERIFIED |
| ASAngers & Salinas Forwarding | Laredo | TX | — | ◇ UNVERIFIED |
| AIAnm, INC | Medford | OR | — | ◇ UNVERIFIED |
| AMApex Metal Finishing-apex Metal Finishing | Saint Louis | MO | — | ◇ UNVERIFIED |
| AIApollo Industries INC | Smyrna | GA | — | ◇ UNVERIFIED |
 Applied Biosystems INC | Foster City | CA | — | ◇ UNVERIFIED |
| Applied Biosystems, LLC | Foster City | CA | — | ◇ UNVERIFIED |
| ASApplied Silicone Corportation | Santa Paula | CA | — | ◇ UNVERIFIED |
| AWAptus (merged W/1250047) | Coffeyville | KS | — | ◇ UNVERIFIED |
| ACAqua Concepts INC. Dba Ag Water Chemical | La Grange | CA | — | ◇ UNVERIFIED |
