Ncr Corp Millsboro Plant

⚠ Superfund · Ready for anticipated reuse

The 2020 five-year review (FYR) shows that the remedies in place are still effective in the short-term. These remedies will continue until the acceptable level of contaminants has been met. During the 2020 FYR, an on-site structure (air stripper building), was found to be in poor condition.

Location

CityMillsboro
CountySussex County
StateDelaware
Coordinates38.57750, -75.28306

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 09/01/1984
  2. Proposed to the National Priorities List — 04/10/1985
  3. Finalized on the National Priorities List — 07/22/1987
  4. Remedial Investigation Started — 03/10/1988
  5. Final Remedy Selected — 08/12/1991
  6. Final Remedial Action Started — 09/16/1994
  7. Construction Completed — 09/27/1996
  8. Deleted from National Priorities List — Not Yet Achieved
  9. Most Recent Five-Year Review — 06/23/2025
  10. Achieved Sitewide Ready for Anticipated Reuse — 06/26/2006

EPA references

Other Superfund sites in Sussex County

EPA-regulated facilities nearby

Understanding this Superfund site

Ncr Corp Millsboro Plant is a federal Superfund site in Delaware. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.

Current status: Ready for anticipated reuse. EPA considers this site ready for anticipated reuse, meaning cleanup has progressed enough for certain land uses. This does not necessarily mean all contamination has been removed — institutional controls like deed restrictions may limit how the land can be used.

EPA has identified 8 contaminants of concern at this site, including 1,1-dichloroethene, chloroethene (vinyl chloride), chloroform. Contamination has been detected in groundwater.

If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.