Colonial Creosote

⚠ Superfund · Listed on NPL

The U.S. Environmental Protection Agency (EPA), is conducting field sampling efforts as part of the phased Remedial Investigation/Feasibility Study (RI/FS) at the Colonial Creosote Superfund site. Additional RI field sampling efforts were conducted inSeptember 2025 and January 2026.

Location

CityBogalusa
CountyWashington County
StateLouisiana
Coordinates30.76806, -89.86389

Cleanup timeline

  1. Initial Assessment Completed — 10/17/2011
  2. Proposed to the National Priorities List — 03/26/2015
  3. Finalized on the National Priorities List — 09/30/2015
  4. Remedial Investigation Started — 08/01/2016
  5. Remedy Selected — Not Yet Achieved
  6. Remedial Action Started — Not Yet Achieved
  7. Construction Completed — Not Yet Achieved
  8. Deleted from National Priorities List — Not Yet Achieved
  9. Most Recent Five-Year Review — Not Yet Achieved
  10. Achieved Sitewide Ready for Anticipated Reuse — Not Yet Achieved

EPA references

EPA-regulated facilities nearby

Understanding this Superfund site

Colonial Creosote is a federal Superfund site in Louisiana. 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: Listed on NPL. This site is on EPA's National Priorities List, which identifies the most serious uncontrolled or abandoned hazardous waste sites in the country. Listing triggers federal cleanup authority and funding under CERCLA (the Superfund law).

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.