| BCBrush Cleaners & Laundromat | Brush | CO | — | ◇ UNVERIFIED |
| BOBuckley Oil CO | Dallas | TX | — | ◇ UNVERIFIED |
| BCBulk Chemicals INC | Hamburg | PA | — | ◇ UNVERIFIED |
| BCBulk Chemicals, INC. | Shoemakersville | PA | — | ◇ UNVERIFIED |
| BCBulk Chemicals, INC. | Blandon | PA | — | ◇ UNVERIFIED |
| BHBunker Hill Mining & Metallurgical Complex | Smelterville | ID | — | ◇ UNVERIFIED |
| BFB.w. Freeman INC. | Cuba | MO | — | ◇ UNVERIFIED |
| BUByk USA INC | Louisville | KY | — | ◇ UNVERIFIED |
| CNC3 Nano INC | Hayward | CA | — | ◇ UNVERIFIED |
| CCCabot CORP Pampa Plant | Pampa | TX | — | ◇ UNVERIFIED |
 Calgon Carbon Corporation | Blue Lake | CA | — | ◇ UNVERIFIED |
| CCCalgon Corporation Sub Merck and CO | Pasadena | TX | — | ◇ UNVERIFIED |
| CMCambridge Major Laboratories | Germantown | WI | — | ◇ UNVERIFIED |
| CMCapital Marble Creations INC | Lillington | NC | — | ◇ UNVERIFIED |
| CCarbolabs | Bethany | CT | — | ◇ UNVERIFIED |
| CCCarbonfree Chemicals | San Antonio | TX | — | ◇ UNVERIFIED |
| CCCardolite CORP | Newark | NJ | — | ◇ UNVERIFIED |
| CICargill INC - Salt Division | Savage | MN | — | ◇ UNVERIFIED |
| CPCarlisle Polyurethane Systems (formerly Acella Polyurethane Systems) | Chattanooga | TN | — | ◇ UNVERIFIED |
| CCCarolina Casting INC | High Point | NC | — | ◇ UNVERIFIED |
| CGCasa Grande Plant Food | Casa Grande | AZ | — | ◇ UNVERIFIED |
| CCCayman Chemical CO | State College | PA | — | ◇ UNVERIFIED |
| CPCci Port Nickel LLC - Port Nickel | Braithwaite | LA | — | ◇ UNVERIFIED |
| CCCcp Composites US LLC Centralia | Centralia | WA | — | ◇ UNVERIFIED |
| CSCdr Systems CORP | Waynoka | OK | — | ◇ UNVERIFIED |
| CSCdr Systems Corporation | Jacksonville | FL | — | ◇ UNVERIFIED |
| CACelanese Acetate LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| CLCelanese Limited | Corpus Christi | TX | — | ◇ UNVERIFIED |
| CLCelanese Ltd-meredosia Facility | Meredosia | IL | — | ◇ UNVERIFIED |
| CCCentral Carbide LLC / Central Carbide LLC | Pryor | OK | — | ◇ UNVERIFIED |
| CCCentral Chemical (hagerstown) | Hagerstown | MD | — | ◇ UNVERIFIED |
| CMCentral Mn Renewables | Little Falls | MN | — | ◇ UNVERIFIED |
| CSCentral States Refining CO INC | Versailles | MO | — | ◇ UNVERIFIED |
| CJCf Jameson | Haverhill | MA | — | ◇ UNVERIFIED |
| CGChannel Greenhunter Biorefinery and Terminals | Houston | TX | — | ◇ UNVERIFIED |
| CSCharleston Steel and Metal Company | North Charleston | SC | — | ◇ UNVERIFIED |
| CBChata Biosystems LLC a Part of Boval CO LP | Loveland | CO | — | ◇ UNVERIFIED |
| CGChattanooga General Services CO. | Chattanooga | TN | — | ◇ UNVERIFIED |
| C3Chem 32 | West Orange | TX | — | ◇ UNVERIFIED |
| CUChemetall Us, INC. | Romulus | MI | — | ◇ UNVERIFIED |
| CFChemical Formulators INC | Tampa | FL | — | ◇ UNVERIFIED |
| CMChemical & Metal Industries INC | Denver | CO | — | ◇ UNVERIFIED |
| CPChemical Pollution Control of Florida LLC - Unit #2 | Deerfield Beach | FL | — | ◇ UNVERIFIED |
| CSChemical Specialists & Development INC | Baton Rouge | LA | — | ◇ UNVERIFIED |
| CSChemical Specialties INC | Freeport | TX | — | ◇ UNVERIFIED |
| CCChemline Ca INC | Compton | CA | — | ◇ UNVERIFIED |
| CRChemoil Refining CORP | Signal Hill | CA | — | ◇ UNVERIFIED |
| CNChemours - Niagara Plant | Niagara Falls | NY | — | ◇ UNVERIFIED |
| CPChemtrade Performance Chemicals US LLC | Kalama | WA | — | ◇ UNVERIFIED |
| CRChemtrade Refinery Sercives INC | Shreveport | LA | — | ◇ UNVERIFIED |
