 Aero Structures Long Island, INC. | Westbury | 20–99 | ● ACTIVE |
 Bioivt, LLC | Woodbury | — | ● ACTIVE |
 Island Pyrochemical Industries CORP | Mineola | — | ● ACTIVE |
 The Ruhof Corporation | Mineola | — | ● ACTIVE |
 Chemaeros Industries LLC | Syosset | — | ● ACTIVE |
 Creaset, INC | Island Park | — | ● ACTIVE |
 General Welding Supply CORP | Westbury | — | ● ACTIVE |
 Industrial Raw Materials LLC | Plainview | — | ● ACTIVE |
 Specialty Solutions Manufacturing, INC. | New Hyde Park | — | ● ACTIVE |
 Virtair INC | New Hyde Park | — | ● ACTIVE |
 Belzona New York LLC | Glen Cove | — | ◐ LIKELY ACTIVE |
| AIAlk-abello, INC | Port Washington | — | ◐ LIKELY ACTIVE |
| ACArrow Chemical CORP | Freeport | — | ◐ LIKELY ACTIVE |
| FPFougera Pharmaceuticals Hicksville Site | Hicksville | 100–499 | ◐ LIKELY ACTIVE |
| APApothecus Pharmaceutical CORP | Hicksville | — | ◇ UNVERIFIED |
| BIBarjan Ind | Hicksville | — | ◇ UNVERIFIED |
| BCBayer CORP. (ruco Polymer Corp.) | Hicksville | — | ◇ UNVERIFIED |
 Bristol-myers Squibb Company | Garden City | — | ◇ UNVERIFIED |
| CCColumbia Cement Company | Freeport | — | ◇ UNVERIFIED |
| FCForsythe Cosmetic Group LTD | Freeport | — | ◇ UNVERIFIED |
| KFKonica Film Paper & Photochem Mfg Plant | Glen Cove | — | ◇ UNVERIFIED |
| LKLith Kem Ko | Lynbrook | — | ◇ UNVERIFIED |
| MPMirandy Products LLC | South Hempstead | — | ◇ UNVERIFIED |
| PLPhoenix Laboratories | Bethpage | — | ◇ UNVERIFIED |
| RHRohm & Haas Electronic Materials LLC | Freeport | — | ◇ UNVERIFIED |
| TCTishcon Corporation | Westbury | — | ◇ UNVERIFIED |
| ACAccurate Chemical & Scientific CORP | Carle Place | — | ▲ REPORTED CLOSED |
| IPIge Performance Chemicals LLC | Mineola | — | ◐ LIKELY ACTIVE |
| NDNuclear Diagnostic Products of New York, INC. | Plainview | — | ◐ LIKELY ACTIVE |
| PLPuracap Laboratories LLC | Greenvale | — | ◐ LIKELY ACTIVE |
| SMSae Manufacturing Specialties CORP. | Bayville | — | ◐ LIKELY ACTIVE |
| LDL D L Precision CORP | Plainview | — | ◇ UNVERIFIED |
| LTLi Tungsten Superfund Site | Glen Cove | — | ◇ UNVERIFIED |
| OPOn Point Powder Coating, LLC | Plainview | — | ◇ UNVERIFIED |
| QLQuality Lineals Usa, INC. | Freeport | — | ◇ UNVERIFIED |
| SCShipley CO L L C | Freeport | — | ◇ UNVERIFIED |
| SNSRK Nutritionals, LLC | Jericho | — | ◇ UNVERIFIED |
| TKTool Klean Inc | Plainview | — | ◇ UNVERIFIED |
| YIYudiva Inc. | Plainview | — | ◇ UNVERIFIED |
