Sauk County Landfill

⚠ Superfund · Construction complete

EPA and Wisconsin Department of Natural Resources completed a review (pdf) (9.56 MB) of the site's cleanup. This type of review is required at least every five years where the cleanup is complete but hazardous waste remains managed on-site. These reviews are done to ensure that the cleanup continues to protect people and the environment.

Location

CityExcelsior
CountySauk County
StateWisconsin
Coordinates43.51450, -89.87750

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 08/01/1984
  2. Proposed to the National Priorities List — 06/24/1988
  3. Finalized on the National Priorities List — 10/04/1989
  4. Remedial Investigation Started — 09/22/1991
  5. Remedy Selected — 03/31/1994
  6. Final Remedy Selected — 09/28/1995
  7. Final Remedial Action Started — 08/20/1994
  8. Construction Completed — 09/01/1995
  9. Deleted from National Priorities List — Not Yet Achieved
  10. Most Recent Five-Year Review — 09/26/2025

EPA references

EPA-regulated facilities nearby

Understanding this Superfund site

Sauk County Landfill is a federal Superfund site in Wisconsin. 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 5 contaminants of concern at this site, including arsenic, beryllium, lead. Contamination has been detected in solid waste.

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.