Adams County Quincy Landfills 2 3

⚠ Superfund · Construction complete

EPA has conducted several five-year reviews of the site’s remedy. These reviews ensure that the remedies put in place protect public health and the environment and function as intended by site decision documents.

Location

CityQuincy
CountyAdams County
StateIllinois
Coordinates39.92944, -91.26847

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 07/01/1983
  2. Proposed to the National Priorities List — 06/24/1988
  3. Finalized on the National Priorities List — 08/30/1990
  4. Remedial Investigation Started — 09/12/1990
  5. Final Remedy Selected — 09/30/1993
  6. Final Remedial Action Started — 12/18/1997
  7. Construction Completed — 03/31/1999
  8. Deleted from National Priorities List — Not Yet Achieved
  9. Most Recent Five-Year Review — 03/09/2023
  10. Achieved Sitewide Ready for Anticipated Reuse — Not Yet Achieved

EPA references

EPA-regulated facilities nearby

Understanding this Superfund site

Adams County Quincy Landfills 2 3 is a federal Superfund site in Illinois. 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: Construction complete. Physical construction of the cleanup remedy is complete, though long-term monitoring and institutional controls typically continue for years or decades. Groundwater treatment systems, for example, often run long after surface cleanup finishes.

EPA has identified 10 contaminants of concern at this site, including 1,1,1-trichloroethane, 1,1-dichloroethane, 1,1-dichloroethene. Contamination has been detected in leachate, 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.