| SISabic Innovative Plastics - Bay St. Louis | Bay St. Louis | — | ◐ LIKELY ACTIVE |
| SSSterling Specialty Chemicals US LLC | Aberdeen | — | ◐ LIKELY ACTIVE |
| TCThe Chemours Company FC, LLC - Delisle | Pass Christian | 100–499 | ◐ LIKELY ACTIVE |
| WOWellman of Mississippi INC | Bay Saint Louis | — | ◐ LIKELY ACTIVE |
| WCWestlake Chemicals & Vinyls LLC | Aberdeen | — | ◐ LIKELY ACTIVE |
| AUAllied Universal Corporation | Ellisville | — | ◐ LIKELY ACTIVE |
| GGGeorgia Gulf Chemicla and Vinyls, LLC | Prairie | — | ◐ LIKELY ACTIVE |
| JBJns Biofuel LLC | New Albany | — | ◐ LIKELY ACTIVE |
| NONitrous Oxide CORP | Yazoo City | — | ◐ LIKELY ACTIVE |
| SASipcam Argo Solutions, LLC | Pachuta | — | ◐ LIKELY ACTIVE |
| TLTronox Llc, Hamilton Facility | Hamilton | — | ◐ LIKELY ACTIVE |
| WOWinchester - Operations Oxford Ms | Oxford | — | ◐ LIKELY ACTIVE |
| ZCZeon Chemicals LP | Hattiesburg | — | ◐ LIKELY ACTIVE |
| VCVicksburg Chemical CO | Vicksburg | — | ◇ UNVERIFIED |
| SCSouth Central Polymers, INC. | Booneville | 20–99 | ◐ LIKELY ACTIVE |
| FPFoam Packaging INC | Vicksburg | 100–499 | ◇ UNVERIFIED |
| HPHunt Process Corporation Southern | Ridgeland | 1–19 | ◇ UNVERIFIED |
| BIBastech INC | Natchez | — | ◐ LIKELY ACTIVE |
| CPChemical Products & Systems, Incorporated | Jackson | — | ◐ LIKELY ACTIVE |
| ECEngelhard Corporation | Jackson | — | ◐ LIKELY ACTIVE |
| GLGcp Laboratories | Gulfport | — | ◐ LIKELY ACTIVE |
| MLMacrosource Llc, Greenville North | Greenville | — | ◐ LIKELY ACTIVE |
| SASipcam Argo Solutions, LLC | Shubuta | — | ◐ LIKELY ACTIVE |
| TLTronox LLC | Hamilton | — | ◐ LIKELY ACTIVE |
| APApollo Petroleum | Picayune | — | ◐ LIKELY ACTIVE |
| BCBakelite Chemicals LLC | Taylorsville | — | ◐ LIKELY ACTIVE |
| DODenbury Onshore Llc, Jackson Dome Facility | Brandon | — | ◐ LIKELY ACTIVE |
| FBFluent By Voyant Beauty | Olive Branch | — | ◐ LIKELY ACTIVE |
| LLLinde LLC | Brandon | — | ◐ LIKELY ACTIVE |
| MAM and M Milling Company | Brookhaven | — | ◐ LIKELY ACTIVE |
| MPMississippi Phosphates CORP | Pascagoula | — | ◐ LIKELY ACTIVE |
| NANufarm Americas, INC - Greenville | Greenville | — | ◐ LIKELY ACTIVE |
| NSNupla - South | Meridian | — | ◐ LIKELY ACTIVE |
| SMSaunders Midwest | Meridian | — | ◐ LIKELY ACTIVE |
| SPScott Petroleum Greenville Terminal | Greenville | — | ◐ LIKELY ACTIVE |
| SCSherwin-williams Company | Olive Branch | — | ◐ LIKELY ACTIVE |
| AUAirgas USA LLC Dba Airgas Dry Ice | Jackson | — | ◇ UNVERIFIED |
| ACAkzonobel Coatinging INC. | Clinton | — | ◇ UNVERIFIED |
| BIBaymont INC | Golden | — | ◇ UNVERIFIED |
| BFBluefire Fulton Renewable Energy LLC | Fulton | — | ◇ UNVERIFIED |
| EAEthos Alternative Energy-mississippi, Ll | Meridian | — | ◇ UNVERIFIED |
| ETExide Technologies, Florence Oxide Plant | Florence | — | ◇ UNVERIFIED |
| FSFive Star Products INC | Ripley | — | ◇ UNVERIFIED |
| GTG2o Technologies LLC | Monticello | — | ◇ UNVERIFIED |
| GFGavilon Fertilizer Llc, Vicksburg Facility | Vicksburg | — | ◇ UNVERIFIED |
| GRGeorgia-pacific Resins, INC. | Louisville | — | ◇ UNVERIFIED |
| HIHercules INC | Hattiesburg | — | ◇ UNVERIFIED |
| KIKior INC | Columbus | — | ◇ UNVERIFIED |
| MSMactor Site | Greenville | — | ◇ UNVERIFIED |
| MTMatheson Tri Gas INC | Madison | — | ◇ UNVERIFIED |