Delaware hosts 18 Superfund cleanup sites, 54 facilities reporting to EPA's Toxic Release Inventory, and 14 facilities currently in significant noncompliance with federal environmental laws. EPA has assessed $18.8M in lifetime penalties across these facilities, and TRI reporters released roughly 5.0M pounds of regulated chemicals on-site in the latest reporting year. The single largest on-site releaser is Delaware City Refining Company Llc in Delaware City, reporting 4.3M lb to EPA.
| Site | City | Status |
|---|---|---|
| Army Creek Landfill | New Castle | Ready for anticipated reuse |
| Blades Groundwater | Blades | Listed on NPL |
| Delaware City Pvc Plant | New Castle | Construction complete |
| Delaware Sand Gravel Landfill | New Castle | Construction complete |
| Dover Air Force Base | Dover | Construction complete |
| Dover Gas Light Co | Dover | Cleanup underway |
| E I Du Pont De Nemours Co Inc Newport Pigment Plant Landfill | Newport | Construction complete |
| East Basin Road Groundwater | New Castle | Listed on NPL |
| Georgetown North Groundwater | Georgetown | Listed on NPL |
| Halby Chemical Co | New Castle | Ready for anticipated reuse |
| Harvey Knott Drum Inc | Kirkwood | Ready for anticipated reuse |
| Hockessin Groundwater | Hockessin | Listed on NPL |
| Koppers Co Inc Newport Plant | Newport | Remedy selected |
| Millsboro Tce | Millsboro | Proposed for NPL |
| Ncr Corp Millsboro Plant | Millsboro | Ready for anticipated reuse |
| Newark South Ground Water Plume | Newark | Listed on NPL |
| Standard Chlorine Of Delaware Inc | New Castle | Cleanup underway |
| Tybouts Corner Landfill | New Castle | Ready for anticipated reuse |