| PTPolymer Technologies, INC. | Newark | — | ◐ LIKELY ACTIVE |
| SHSiemens Healthcare Diagnostics | Newark | — | ◐ LIKELY ACTIVE |
| THThe Hibbert Group | New Castle | — | ◐ LIKELY ACTIVE |
| AMAig Marketing - 3 Beaver Valley Rd, Wilmington | Wilmington | — | ◇ UNVERIFIED |
| ALAir Liquide Industrial US LP | Delaware City | — | ◇ UNVERIFIED |
| APAir Products & Chemicals, INC. H2 Smr Plant at Delaware City Refining Company | Delaware City | — | ◇ UNVERIFIED |
| APAir Products New Castle De H2 Plant | Delaware City | — | ◇ UNVERIFIED |
| ACAkzo Chemicals INC. | Delaware City | — | ◇ UNVERIFIED |
| AWAlanx Wear Solutions INC | Newark | — | ◇ UNVERIFIED |
| AAAmerican Air Liquide-glasgow | Newark | — | ◇ UNVERIFIED |
| AGAny Garment Cleaners #106 | Wilmington | — | ◇ UNVERIFIED |
| ACArch Chemicals INC | New Castle | — | ◇ UNVERIFIED |
| APAstrazeneca Pharmaceuticals, Llc-newark | Newark | — | ◇ UNVERIFIED |
| AEAvalon Exhibits INC | New Castle | — | ◇ UNVERIFIED |
| BCBasf Colors and Effects Usa, LLC | Newport | — | ◇ UNVERIFIED |
| BABernies Automotive | Middletown | — | ◇ UNVERIFIED |
| BWBj's Wholesale Club #0178 | Newark | — | ◇ UNVERIFIED |
| BSBlue Swan Wilmington | Wilmington | — | ◇ UNVERIFIED |
| BIBruce Industrial CO INC | New Castle | — | ◇ UNVERIFIED |
| CMCermet Materials INC | Wilmington | — | ◇ UNVERIFIED |
| CEChemical Equipment Labs, INC. | Wilmington | — | ◇ UNVERIFIED |
| CEChemours - Edge Moor Plant | Wilmington | — | ◇ UNVERIFIED |
| CGCiba Geigy Plant - 205 South James St, Newport | Newport | — | ◇ UNVERIFIED |
| CPColony Pool Service INC. | Wilmington | — | ◇ UNVERIFIED |
| CICytec Industries INC. | New Castle | — | ◇ UNVERIFIED |
| DPDelaware Park Racetrack & Casino | Wilmington | — | ◇ UNVERIFIED |
| DCDupont Corporate | Wilmington | — | ◇ UNVERIFIED |
| DEDupont Electronic Materials Cmp, Llc-building 8 | Newark | — | ◇ UNVERIFIED |
| DHDupont Hay Road Sludge Drying Site | Wilmington | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Christiana Lab | Wilmington | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Glasgow Site | Newark | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Holly Run Plant | Newport | — | ◇ UNVERIFIED |
| EMEssential Minerals LLC - Lambson Plant | New Castle | — | ◇ UNVERIFIED |
| FDFamily Dollar #11978 | Newark | — | ◇ UNVERIFIED |
| GEGalloway Electric CO INC | Newark | — | ◇ UNVERIFIED |
| GEGe Energy (usa) LLC | Newark | — | ◇ UNVERIFIED |
| HIHalosil International, INC. | New Castle | — | ◇ UNVERIFIED |
| HCHarmony Cleaners | Newark | — | ◇ UNVERIFIED |
| HTHigh Tech Auto Body INC | Wilmington | — | ◇ UNVERIFIED |
| HSHockessin Sunoco Service Station 0004 743 - 7427 Lancaster Pike, Hockessin | Hockessin | — | ◇ UNVERIFIED |
| HIHoneywell International Inc-claymont | Claymont | — | ◇ UNVERIFIED |
| IAInvista Applied Research Centre | New Castle | — | ◇ UNVERIFIED |
| JTJust Tires - Goodyear | Wilmington | — | ◇ UNVERIFIED |
| KDKaneka Delaware Corporation | Delaware City | — | ◇ UNVERIFIED |
| LCLanxide Corporation | Newark | — | ◇ UNVERIFIED |
| LLLinde LLC | Claymont | — | ◇ UNVERIFIED |
| MPModern Press INC | Wilmington | — | ◇ UNVERIFIED |
| NANewark Armed Forces Reserve Center | Newark | — | ◇ UNVERIFIED |
| PCPtfe Compounds INC | New Castle | — | ◇ UNVERIFIED |
| RARohm and Haas Electronic Materials Cmp INC | Newark | — | ◇ UNVERIFIED |
