| CPCarbit Paint CO | Chicago | — | ◇ UNVERIFIED |
| CCCedar Concepts INC | Chicago | — | ◇ UNVERIFIED |
| CLCelanese Ltd-meredosia Facility | Meredosia | — | ◇ UNVERIFIED |
| CCCelta Chemical | Granite City | — | ◇ UNVERIFIED |
| CIChemstream INC Midwest Branch | West Frankfort | — | ◇ UNVERIFIED |
| CAChemtura Agrosolutions -trace Chemicals | Pekin | — | ◇ UNVERIFIED |
| CWChicagoland Warehouse and Transportation, INC. | Bridgeview | — | ◇ UNVERIFIED |
| CMChicago Metallic Corp-interfinish Plant | Bridgeview | — | ◇ UNVERIFIED |
| CSChicago Specialties, LLC | Chicago | — | ◇ UNVERIFIED |
| CMChilo Manufacturing & Plating Company | Chicago | — | ◇ UNVERIFIED |
| CLChroma Liquid Color CORP | Chicago Heights | — | ◇ UNVERIFIED |
| CJC J R Processing CO | Des Plaines | — | ◇ UNVERIFIED |
| CMClaire Manufacturing | Addison | — | ◇ UNVERIFIED |
| CClariant | Mchenry | — | ◇ UNVERIFIED |
 Clarke Mosquito Control Products INC. | Schaumburg | — | ◇ UNVERIFIED |
| CPClorox Products | Chicago | — | ◇ UNVERIFIED |
| CSClorox Sales CO | Minooka | — | ◇ UNVERIFIED |
| CICmic INC | Skokie | — | ◇ UNVERIFIED |
| CGCn Group | Melrose Park | — | ◇ UNVERIFIED |
| CSCoated Sand Solutions LLC | Rochelle | — | ◇ UNVERIFIED |
| CCCommercial Cleanser CO | Schiller Park | — | ◇ UNVERIFIED |
| CHCp Hall CO | Bedford Park | — | ◇ UNVERIFIED |
| CLCrawford Laboratories | Chicago | — | ◇ UNVERIFIED |
| CCCronus Chemicals LLC | Tuscola | — | ◇ UNVERIFIED |
| CCCustom Compounding Services LLC | Rockford | — | ◇ UNVERIFIED |
| DIDay International Chemical Products Div | Addison | — | ◇ UNVERIFIED |
| DJDepue/new Jersey Zinc/mobil Chemical CORP. | Depue | — | ◇ UNVERIFIED |
| DIDesoto INC - Chemical Products Div | Joliet | — | ◇ UNVERIFIED |
| DCDetrex CORP Solvent & Env Svc | Melrose Park | — | ◇ UNVERIFIED |
| DCDeveco CORP | Belvidere | — | ◇ UNVERIFIED |
| DMDfg Mercury CORP | Evanston | — | ◇ UNVERIFIED |
| DBDiamond Biofuels INC | Mazon | — | ◇ UNVERIFIED |
| DCDober Chemical CORP | Midlothian | — | ◇ UNVERIFIED |
| DADow Automotive | Kankakee | — | ◇ UNVERIFIED |
| DDDsm Desotech INC | Elgin | — | ◇ UNVERIFIED |
| DPDupli-color Products | Elk Grove Village | — | ◇ UNVERIFIED |
| DSDurable Specialty Coatings | Chicago | — | ◇ UNVERIFIED |
| EZEagle Zinc CO | Hillsboro | — | ◇ UNVERIFIED |
| EFEarth Friendly Products | Wood Dale | — | ◇ UNVERIFIED |
| EFEarth Friendly Products | Addison | — | ◇ UNVERIFIED |
| EIEcolab INC | Cairo | — | ◇ UNVERIFIED |
| EIEcolab INC | Morris | — | ◇ UNVERIFIED |
| EIEcp INC | Bedford Park | — | ◇ UNVERIFIED |
| EMEmd Millipore CORP | Kankakee | — | ◇ UNVERIFIED |
| EHEmerald Hilton Davis LLC | West Chicago | — | ◇ UNVERIFIED |
| EIEndpoint INC | Rockford | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions (eps) INC D | Tinley Park | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions INC | Chicago | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions INC | Carol Stream | — | ◇ UNVERIFIED |
| EIEnthone INC | Bridgeview | — | ◇ UNVERIFIED |
