| FIFasloc INC Potomac River Plant | Falling Waters | — | ◇ UNVERIFIED |
| FEFike Enterprises INC | Nitro | — | ◇ UNVERIFIED |
| FGFlint Group Printing Systems US Llc, Huntington | Huntington | — | ◇ UNVERIFIED |
| FCFmc Corporation, Spring Hill Plant | South Charleston | — | ◇ UNVERIFIED |
| FMF M C CORP - Specialty Chem Div | Bens Run | — | ◇ UNVERIFIED |
| FCFmw Composite Systems | Bridgeport | — | ◇ UNVERIFIED |
| GSGe Special Chemicals INC Lab | Morgantown | — | ◇ UNVERIFIED |
| GWGlyeco West Virginia INC - Recovery Solutions & Technologies INC | Nitro | — | ◇ UNVERIFIED |
| GCGrant County Mulch, INC. | Bruceton Mills | — | ◇ UNVERIFIED |
| GLGreat Lakes Chemical CORP. | Nitro | — | ◇ UNVERIFIED |
| GVGreenbrier Valley Farm Ctr. INC. | Ronceverte | — | ◇ UNVERIFIED |
| HMHartley Manufacturing CO | Ravenswood | — | ◇ UNVERIFIED |
| HWHolistic Wv Farms I, LLC | Beaver | — | ◇ UNVERIFIED |
| HNHoneywell National Priority List Cleanup | Moundsville | — | ◇ UNVERIFIED |
| IWInstitute Wv Facility | Institute | — | ◇ UNVERIFIED |
| LCLanxess CORP | Natrium | — | ◇ UNVERIFIED |
| LLLinde LLC | Washington | — | ◇ UNVERIFIED |
| LLLinde, LLC #315 | New Cumberland | — | ◇ UNVERIFIED |
| LHLoudon Heights Fuel CO. | Baker | — | ◇ UNVERIFIED |
| MIMedline Industries, INC. | Prichard | — | ◇ UNVERIFIED |
| MSMountain Supply and Service Wheeling | Wheeling | — | ◇ UNVERIFIED |
| MPMylan Pharmaceuticals, Morgantown | Morgantown | — | ◇ UNVERIFIED |
| NPNiche Polymer LLC | Ravenswood | — | ◇ UNVERIFIED |
| NCNorth Charleston Distribution Terminal, Union Carb | Charleston | — | ◇ UNVERIFIED |
| OCOlin Chemicals | Moundsville | — | ◇ UNVERIFIED |
| OCOlin CORP - Moundsville Plant | Moundsville | — | ◇ UNVERIFIED |
| PPPactiv Packaging INC | Mineral Wells | — | ◇ UNVERIFIED |
| PBP B & S Chem CO | Proctor | — | ◇ UNVERIFIED |
 Phibro Animal Health Corporation | Willow Island | — | ◇ UNVERIFIED |
| PCPraxair Com | Marmet | — | ◇ UNVERIFIED |
| PAProviron America INC | Friendly | — | ◇ UNVERIFIED |
| RCRaybo Chemical CO | Huntington | — | ◇ UNVERIFIED |
| RJR J Recycling LLC | Parkersburg | — | ◇ UNVERIFIED |
| SSherwin-williams #701960 | Oak Hill | — | ◇ UNVERIFIED |
| SSofie | Morgantown | — | ◇ UNVERIFIED |
| SLSolenis LLC | Stanaford | — | ◇ UNVERIFIED |
| SASolutia-ops at Flexsys Nitro | Nitro | — | ◇ UNVERIFIED |
| SPSpecialty Products Us, LLC | Institute | — | ◇ UNVERIFIED |
| SPSpecialty Products Us, LLC - Glutaraldehyde Plant | Institute | — | ◇ UNVERIFIED |
| TCTetra Chemicals | Parkersburg | — | ◇ UNVERIFIED |
| UCUnion Carbide CORP Holz Impoundment | Near South Charleston | — | ◇ UNVERIFIED |
| AMA&M Manufacturing Co | Martinsburg | 100–499 | ◐ LIKELY ACTIVE |
| APAustin Powder Appalachia LLC - Mt. Hope | Mt. Hope | 20–99 | ◐ LIKELY ACTIVE |
 Austin Powder Appalachia LLC - Mt. Hope | Mount Hope | 20–99 | ◐ LIKELY ACTIVE |
| APAutomated Packaging Systems LLC of Sealed Air | Keyser | 100–499 | ◐ LIKELY ACTIVE |
 Carbon Activated Corp - West Verginia | Mount Hope | 20–99 | ◐ LIKELY ACTIVE |
| CSCytec Solvay Group Willow Island Plant | Willow Island | 100–499 | ◐ LIKELY ACTIVE |
| DUDelrin USA, LLC | Washington | 100–499 | ◐ LIKELY ACTIVE |
| EUEcolab US20/21 | Martinsburg | 100–499 | ◐ LIKELY ACTIVE |
| EUECO USA, LLC - Parkersburg | Parkersburg | 20–99 | ◐ LIKELY ACTIVE |
