| KIKing Industries | Waterbury | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| MSMacdermid Specialty Chemical Services | Waterbury | CT | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| PAPfaltz and Bauer Incorporated | Waterbury | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PDPlastic Design INC | Middletown | CT | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| SIStanchem INC | East Berlin | CT | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| 1W100 Waterfront Street | New Haven | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| BRBedoukian Research INC | Danbury | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PUPharmacia & Upjohn (former) | North Haven | CT | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| 5P5n Plus | Fairfield | CT | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| 5P5n Plus INC | Trumbull | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| AAplicare | Meriden | CT | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BIBeiersdorf, INC. | Norwalk | CT | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BCBlue Crest INC | Danbury | CT | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| BBBridgeport Biodiesel LLC | Bridgeport | CT | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
Bristol-myers Squibb Research & Development | Wallingford | CT | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BUByk USA LLC | North Haven | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCarbolabs | Bethany | CT | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| EIEcometics INC | Norwalk | CT | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ECElectric Cable Compounds | Seymour | CT | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| FTFerti Technologies Ct CORP | Wallingford | CT | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| HLHenkel Loctite Corporation | Rocky Hill | CT | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| HKH Krevit & CO Water Treatment Chemicals | New Haven | CT | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| MCMacdermid Closed | Waterbury | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MEMacdermid Enthone INC | Orange | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MIMaxam Initiation Systems | Sterling | CT | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| MTMelinta Therapeutics INC | New Haven | CT | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| NENew England Discovery Partners | Branford | CT | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| NMNew Milford Ct Farms Compost | New Milford | CT | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| NINutrico, INC | Bridgeport | CT | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| PIP&g-clairol, INC. | Stamford | CT | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| PPPhoenix Products CO | Terryville | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| PSPhoenix Soil LLC | Waterbury | CT | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| PSPhoenix Soil, LLC | Plainville | CT | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| PRPolymer Resources LTD | Farmington | CT | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
Ppg Architectural Finishes, INC. | Watertown | CT | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| PWPraxair - Worldwide Headquarters | Danbury | CT | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| SSSafety-kleen Systems | Bridgeport | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| SCStamford CORP I | Stamford | CT | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| SPSun Products CORP | Trumbull | CT | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| UU.s.cosmetics | Killingly (dayville) | CT | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| YUYale University | West Haven | CT | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AMABA-PGT Manchester Location | Manchester | CT | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| AVABA-PGT Vernon Location | Vernon | CT | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| ASAbsolute Standards INC | Middletown | CT | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| AAAmSty Allyn's Point | Gales Ferry | CT | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| ABAvient - Bethel | Bethel | CT | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| ANAvient - NEU | North Haven | CT | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| AWAzure Water Services, LLC | West Haven | CT | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| BMBepuit Managements LLC | Derby | CT | Chemical Manufacturing325611 | — | ▲ REPORTED CLOSED |
| BEBotanical Extract Manufacturer | Monroe | CT | Chemical Manufacturing325620 | 20-99 | ◐ LIKELY ACTIVE |