| KAKuraray America, INC | Pasadena | — | ◐ LIKELY ACTIVE |
| PIPurity Isobutylene Plant and Pasadena Terminal | Pasadena | — | ◐ LIKELY ACTIVE |
| STScion Technologies | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
Southern Ionics INC | Pasadena | — | ◐ LIKELY ACTIVE |
| AAAmerican Acryl | Pasadena | — | ◐ LIKELY ACTIVE |
| CCCalpine Clear Lake Cogeneration | Pasadena | — | ◐ LIKELY ACTIVE |
| SPSunedison Polysilicon Facility | Pasadena | — | ◐ LIKELY ACTIVE |
| ZCZeon Chemicals Texas Plant | Pasadena | — | ◐ LIKELY ACTIVE |
| BPBayport Plant | Pasadena | — | ◇ UNVERIFIED |
| BGBoc Gases | Pasadena | — | ◇ UNVERIFIED |
| CCCalgon Corporation Sub Merck and CO | Pasadena | — | ◇ UNVERIFIED |
| EEEffective Environmental - Pasadena Facility | Pasadena | — | ◇ UNVERIFIED |
| ECEthyl Corporation | Pasadena | — | ◇ UNVERIFIED |
| EPEvonik Pasadena | Pasadena | — | ◇ UNVERIFIED |
| HHHna Holdings INC. | Pasadena | — | ◇ UNVERIFIED |
| KTKaneka Texas Cpvc Plant | Pasadena | — | ◇ UNVERIFIED |
| KCKior CORP | Pasadena | — | ◇ UNVERIFIED |
| KAKuraray America Inc., Poval Bu, Bayport Plant | Pasadena | — | ◇ UNVERIFIED |
| LLLinde-clear Lake | Pasadena | — | ◇ UNVERIFIED |
| PMPasadena Methanol Plant | Pasadena | — | ◇ UNVERIFIED |
| PCPolyone Corporation | Pasadena | — | ◇ UNVERIFIED |
| SPSun Products Corporation Texas | Pasadena | — | ◇ UNVERIFIED |
| SUSyensqo USA LLC | Pasadena | — | ◇ UNVERIFIED |
Syngenta Crop Protection - Bay Port Site | Pasadena | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley INC | Pasadena | — | ◇ UNVERIFIED |
| TCTotal Clean Pasadena Tank Wash | Pasadena | — | ◇ UNVERIFIED |
| UEUSA Environment | Pasadena | — | ◇ UNVERIFIED |
| ALAir Liquide Large Industries - Bayport Complex | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| APAir Products and Chemicals Operating Service Center (OSC) | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| AAmericanAcryl | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| ACArkema Clear Lake | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| AMAurora Material Solutions - TXUS01PR | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| BPBayport Polymers LLC dba Baystar | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| CLCelanese LTD, Clear Lake | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| CCClariant Corporation | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| EElastomers | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| ECEquistar Chemical, LP - A Lyondellbasell Company, Bayport | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| EEval | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| EAEvonik Active Oxygens, LLC - Bayport | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| EPEvonik Pasadena Plant | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| GPGeon Performance Solutions Pasadena | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| HMHalliburton: Multi-Chem | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| IVIndorama Ventures Pasadena Site | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| ISINEOS Styrolution | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| KPKetjen Pasadena | Pasadena | 100–499 | ◐ LIKELY ACTIVE |
| KKpac | Pasadena | 1–19 | ◐ LIKELY ACTIVE |
| MOMacDermid Offshore Solutions | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| MCMitsubishi Chemical America, Inc. - Specialty Resins Divisin | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
| MPModern Polymer PRODUCTS INC | Pasadena | 20–99 | ◐ LIKELY ACTIVE |
Modern Polymers Pipe and Extrusion LLC | Pasadena | 20–99 | ◐ LIKELY ACTIVE |