| CCal-clean | Dudley | NC | — | ◐ LIKELY ACTIVE |
| CCCalifornia Cartage Company LLC | Carson | CA | — | ◐ LIKELY ACTIVE |
| CCCalifornia Cascade Building Materials INC | Sacramento | CA | 20–99 | ◐ LIKELY ACTIVE |
| CPCal-tex Protective Coatings | Schertz | TX | 100–499 | ◐ LIKELY ACTIVE |
| CRCalumet River Fleeting - Chicago Dry Dock | Chicago | IL | 1–19 | ◐ LIKELY ACTIVE |
| CCCamco Chemical CO | Florence | KY | 100–499 | ◐ LIKELY ACTIVE |
| CCCandle Corporation of America, INC. | Elkin | NC | — | ◐ LIKELY ACTIVE |
| CECap Ewg Glass LLC | Mcadoo | PA | — | ◐ LIKELY ACTIVE |
| CCapsum | Del Valle | TX | 20–99 | ◐ LIKELY ACTIVE |
| CCCare Cremation Center | Romeoville | IL | — | ◐ LIKELY ACTIVE |
| CCCar-freshner Corporation | Watertown | NY | 100–499 | ◐ LIKELY ACTIVE |
| CTCarlinville Truck Equipment INC | Carlinville | IL | — | ◐ LIKELY ACTIVE |
| CSCarroll Service Company-milledgeville Plant | Milledgeville | IL | — | ◐ LIKELY ACTIVE |
| CVCedar Valley Manufacturing & CORP | Hollister | CA | 1–19 | ◐ LIKELY ACTIVE |
| CRCei - Roanoke, INC | Roanoke | VA | — | ◐ LIKELY ACTIVE |
| CICentral Ink CORP | West Chicago | IL | — | ◐ LIKELY ACTIVE |
| CICf Industries - Cowden Terminal | Cowden | IL | — | ◐ LIKELY ACTIVE |
| CTCheck Technology Solutions LLC | Troy | MI | 20–99 | ◐ LIKELY ACTIVE |
| CPChemical Products & Systems, Incorporated | Jackson | MS | — | ◐ LIKELY ACTIVE |
| CEChevron Environmental Management CO | Lockport | IL | — | ◐ LIKELY ACTIVE |
| CRCheyenne Renewable Diesel Company LLC | Cheyenne | WY | — | ◐ LIKELY ACTIVE |
| CHChicago Hardware & Fixture CO | Franklin Park | IL | 20–99 | ◐ LIKELY ACTIVE |
| CEChip Energy | Goodfield | IL | — | ◐ LIKELY ACTIVE |
| CDChurch & Dwight CO. INC | Victorville | CA | 100–499 | ◐ LIKELY ACTIVE |
| CCintas | Cumberland | RI | — | ◐ LIKELY ACTIVE |
| CKCircle K 6788 Aka Shell | Chicago | IL | — | ◐ LIKELY ACTIVE |
| COCity of Quincy, Water Department Filtration Facili | Quincy | IL | — | ◐ LIKELY ACTIVE |
| COCity of Santa Maria Landfill | Santa Maria | CA | — | ◐ LIKELY ACTIVE |
| CMClorox Manufacturing Atlanta West | Forest Park | GA | — | ◐ LIKELY ACTIVE |
| CFCoal Fillers INC | Bluefield | VA | — | ◐ LIKELY ACTIVE |
| CACoats American - Rosman Nc | Rosman | NC | — | ◐ LIKELY ACTIVE |
| CPColgate Palmolive Company | Cambridge | OH | 100–499 | ◐ LIKELY ACTIVE |
| CCColgate-palmolive Company | Hodges | SC | 100–499 | ◐ LIKELY ACTIVE |
| CPColgate Palmolive Flavors and Fragrances Compounding Ctr | Burlington | NJ | — | ◐ LIKELY ACTIVE |
| COCollege of Lake County - Roadway and Outdoor Sports Complex | Grayslake | IL | — | ◐ LIKELY ACTIVE |
| CCColourpop Cosmetics LLC | Oxnard | CA | 20–99 | ◐ LIKELY ACTIVE |
| CCConair Corporation - Rantoul Plant | Rantoul | IL | — | ◐ LIKELY ACTIVE |
| CLConcept Laboratories Pleasant Prairie | Pleasant Prairie | WI | 100–499 | ◐ LIKELY ACTIVE |
| CMContinental Manufacturing Chemist, Inc. | Huxley | IA | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Lexington | KY | — | ◐ LIKELY ACTIVE |
| CSCork Supply USA | Benicia | CA | 20–99 | ◐ LIKELY ACTIVE |
| CECosmetic Essence LLC | Holmdel | NJ | — | ◐ LIKELY ACTIVE |
| CUCoty USA Incorporated | Sanford | NC | — | ◐ LIKELY ACTIVE |
| CSCovia Specialty Minerals INC. - Elco Plant | Elco | IL | — | ◐ LIKELY ACTIVE |
| CSCpv Sentinel Energy Proj | Desert Hot Springs | CA | — | ◐ LIKELY ACTIVE |
| CMCrescent Marketing (dba Crescent Mfg ) | Eden | NY | — | ◐ LIKELY ACTIVE |
| COCrm of America | Mesa | AZ | 20–99 | ◐ LIKELY ACTIVE |
| CRCummins Rocky Mount Engine Plant | Whitakers | NC | 500+ | ◐ LIKELY ACTIVE |
| DMDaily Manufacturing | Fontana | CA | — | ◐ LIKELY ACTIVE |
| DLDermalogica LLC | Carson | CA | — | ◐ LIKELY ACTIVE |