| CNCooper Natural Resources | Loop | TX | — | ◇ UNVERIFIED |
| C1Cor 13 Technologies INC | Pasadena | CA | — | ◇ UNVERIFIED |
| CBCorrib Biofuels Holdings | Elizabeth | NJ | — | ◇ UNVERIFIED |
| CFCorteva Freeport Operations | Freeport | TX | — | ◇ UNVERIFIED |
| CLCovestro LLC | Proctor | WV | — | ◇ UNVERIFIED |
| CLCovestro LLC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| CCCp Chemicals Group LP | Wickliffe | OH | — | ◇ UNVERIFIED |
| CHCp Hall CO | Bedford Park | IL | — | ◇ UNVERIFIED |
| CSCq Sulfur Pile | Peru | KS | — | ◇ UNVERIFIED |
| CCCrazy Chemical CORP. | Orlando | FL | — | ◇ UNVERIFIED |
| CMCristal Metals Inc-titanium Powder Plant | Ottawa | IL | — | ◇ UNVERIFIED |
| CSC S Bio Co. | Milpitas | CA | — | ◇ UNVERIFIED |
| CPCudd Pressure Control, INC. | Port Arthur | TX | — | ◇ UNVERIFIED |
| CSCvc Specialty Chemicals, INC. - Maple Shade Plant | Maple Shade Twp | NJ | — | ◇ UNVERIFIED |
| CICytec Industries, Willow Island Plant | Belmont | WV | — | ◇ UNVERIFIED |
| DCDaniel Clnr Svc | Willow Grove | PA | — | ◇ UNVERIFIED |
| DUDanisco USA INC. - Newark | Newark | DE | — | ◇ UNVERIFIED |
| DRDarlington Ridge Farms LLC | Darlington | WI | — | ◇ UNVERIFIED |
 Dcx-chol Enterprises Newvac Division | Chatsworth | CA | — | ◇ UNVERIFIED |
| DSDdp Specialty Electronic Materials US LLC | Auburn Hills | MI | — | ◇ UNVERIFIED |
| DTDelta Trading Ico Crimson Resource Mgmt | Bakersfield | CA | — | ◇ UNVERIFIED |
| DWDenver Water - Westside | Denver | CO | — | ◇ UNVERIFIED |
| DSDetroit Salt Company LLC | Anderson | IN | — | ◇ UNVERIFIED |
| DTDimension Technology Chemical Systems INC | Sacramento | CA | — | ◇ UNVERIFIED |
| DDDiversey/old Dominion | Macon | GA | — | ◇ UNVERIFIED |
| DCDixie Chemical Bayport Facility | Pasadena | TX | — | ◇ UNVERIFIED |
| D2Dna 20 | Newark | CA | — | ◇ UNVERIFIED |
| DPD&N Properties, LLC | Albuquerque | NM | — | ◇ UNVERIFIED |
| DCDodge Company the | Cambridge | MA | — | ◇ UNVERIFIED |
| DSDoe/wsrc Savannah River Site | Jackson | SC | — | ◇ UNVERIFIED |
| DSDongjin Semichem Texas | Killeen | TX | — | ◇ UNVERIFIED |
| DCDover Chemical CORP (0679010132) | Dover | OH | — | ◇ UNVERIFIED |
| DCDow Chemical | Houston | TX | — | ◇ UNVERIFIED |
| DCDow Chemical | La Porte | TX | — | ◇ UNVERIFIED |
| DCDow Chemical-midland | Midland | MI | — | ◇ UNVERIFIED |
| DCDow Chem Plp | Royersford | PA | — | ◇ UNVERIFIED |
| DCDow Corning Corporation | Mount Meigs | AL | — | ◇ UNVERIFIED |
 Dow Silicones Corporation | Auburn | MI | — | ◇ UNVERIFIED |
| Dow Silicones Corporation-midland Site | Midland | MI | — | ◇ UNVERIFIED |
| DEDpc Enterprises, L.p. | Chattanooga | TN | — | ◇ UNVERIFIED |
| D2Dsm 2024projects | Kingstree | SC | — | ◇ UNVERIFIED |
| DCDsm Chemicals North America | Augusta | GA | — | ◇ UNVERIFIED |
| DCDubois Chemicals INC | Detroit | MI | — | ◇ UNVERIFIED |
| DCDubois Chemicals INC. | Fairfield | OH | — | ◇ UNVERIFIED |
| DMDupont-chemours Montague Site | Montague | MI | — | ◇ UNVERIFIED |
| DSDupont Specialty Products Usa, LLC | Moncks Corner | SC | — | ◇ UNVERIFIED |
| DADurango Air Tanker Base | Ignacio | CO | — | ◇ UNVERIFIED |
| DNDyno Nobel INC | Deer Island | OR | — | ◇ UNVERIFIED |
| ECEagle Chemical | Mobile | AL | — | ◇ UNVERIFIED |
| EIEaglepicher Industries Agri Sul Plant | Mineola Tx | TX | — | ◇ UNVERIFIED |
