Superfund Sites in New Castle County, Delaware

New Castle County, Delaware is home to 588,026 residents. Land Owl's EPA Superfund site layer records the following within the county boundary — EPA Superfund sites: 15. Sites on the National Priorities List: 12. Sites deleted from the list after cleanup: 3. Community with the most listed sites: New Castle County (5). Communities with a listed site: 8. First site listed: 1983. Most recent site listed: 2023. Listed site: Hockessin Groundwater. Every feature shown on the map above is clickable, and the figures on this page are derived from the same data the map renders, so they always agree. A free Land Owl account adds parcel boundaries, ownership records, flood zones, soils and wetlands over the same view.

Frequently asked questions

How many Superfund sites are there in New Castle County, Delaware?

Land Owl maps 15 EPA Superfund sites in New Castle County, Delaware, including 3 that EPA has deleted from the National Priorities List after cleanup.

Is this Superfund site map free to use?

Yes. This map is free to view. A free Land Owl account unlocks the other data layers, parcel boundaries and ownership records.

Where does this data come from?

Land Owl maps Superfund sites from the U.S. Environmental Protection Agency's CERCLA record, including sites on the National Priorities List, sites proposed for it, and sites deleted from it after cleanup. A deleted site is one EPA has determined needs no further federal response; it is not a statement that the site was never contaminated, and its history still appears in a Phase I environmental site assessment.

Does a nearby Superfund site affect a property?

It can, and it is a standard question in a Phase I environmental site assessment — the screen a lender orders before financing commercial land. Proximity alone is not contamination, but a listed site nearby is a reason to ask what the plume is, where it is going, and what EPA's record says.