Sheboygan Harbor River

⚠ Superfund · Construction complete

EPA completed the Fourth Five-Year Review (pdf) (123 MB) for the Sheboygan Harbor & River Superfund Site. Five-Year Reviews are required by the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), commonly known as Superfund, when hazardous substances remain on-site above levels that permit unrestricted use and unlimited exposure.

Location

CitySheboygan
CountySheboygan County
StateWisconsin
Coordinates43.74944, -87.70075

Contaminants of concern

Contaminated media

Cleanup timeline

  1. Initial Assessment Completed — 05/29/1985
  2. Proposed to the National Priorities List — 09/18/1985
  3. Finalized on the National Priorities List — 06/10/1986
  4. Remedial Investigation Started — 04/11/1986
  5. Final Remedy Selected — 05/12/2000
  6. Remedial Action Started — 06/10/2004
  7. Final Remedial Action Started — 09/24/2012
  8. Construction Completed — 01/30/2013
  9. Deleted from National Priorities List — Not Yet Achieved
  10. Most Recent Five-Year Review — 07/28/2025

EPA references

Other Superfund sites in Sheboygan County

EPA-regulated facilities nearby

Understanding this Superfund site

Sheboygan Harbor River 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 9 contaminants of concern at this site, including arsenic, cadmium, chromium. Contamination has been detected in sediment, surface water.

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.