| TLThe Lubrizol CORP - Deer Park Plant | Deer Park | TX | Chemical Manufacturing325110 | 500+ | ● ACTIVE |
Eton Pharmaceuticals, INC. | Deer Park | IL | Chemical Manufacturing325412 | — | ● ACTIVE |
| DGDp Glycine LLC (formerly Geo Specialty Chemicals) | Deer Park | TX | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| RARohm and Haas Texas Incorporated | Deer Park | TX | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| TPTotal Petrochemicals & Refining USA INC | Deer Park | TX | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| OVOxy Vinyls LP - Deer Park Pvc | Deer Park | TX | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| RURohmax USA LP | Deer Park | TX | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PDPraxair Deer Park Plant | Deer Park | TX | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| TMTexas Molecular - Deer Park Services | Deer Park | TX | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| DPDeer Park Plant | Deer Park | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| GOGlobal Octanes Deer Park Facility | Deer Park | TX | Chemical Manufacturing325000 | — | ◇ UNVERIFIED |
| RARohm and Haas Chemicals Llc, Lone Star Plant | Deer Park | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| SNSgs North America | Deer Park | TX | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| TGThe Geon Company | Deer Park | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| GSGEO Specialty Chemicals - Deer Park | Deer Park | TX | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| OPOxyVinyls-Deer Park VCM Plant | Deer Park | TX | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| SDShell Deer Park Chemical | Deer Park | TX | Chemical Manufacturing325110 | 100-499 | ◐ LIKELY ACTIVE |
| TDThe Dow Chemical Company - Deer Park, TX | Deer Park | TX | Chemical Manufacturing325199 | 500+ | ◐ LIKELY ACTIVE |
| WEWestlake Epoxy Deer Park Texas | Deer Park | TX | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| ASAqua Solutions | Deer Park | TX | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| BIBLI International Inc. | Deer Park | NY | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| GDGarner Deer Park Office | Deer Park | TX | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| LPLa Porte Polypropylene | Deer Park | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| OVOxy Vinyls Deer Park Vcm Plant | Deer Park | TX | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| OVOxy Vinyls LP - Deer Park Vcm Facility | Deer Park | TX | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| PPPolyethylene Plant | Deer Park | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PPPolypropylene Plant | Deer Park | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| WEWestlake Epoxy Deer Park | Deer Park | TX | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |