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Calcasieu Estuary Remedial Investigation

The Calcasieu Estuary is in the southwestern corner of Louisiana, covering approximately 19.3 square miles of the Calcasieu River basin. It extends from a constructed saltwater barrier on the Calcasieu River north of the city of Lake Charles, Louisiana; and south to Moss Lake, approximately 14.9 miles south of Lake Charles.

The U.S. Environmental Protection Agency (EPA) Region 6 conducted a Remedial Investigation (RI) portion of a RI/ feasibility study (FS) for the Calcasieu Estuary in Calcasieu Parish, Louisiana. The RI was authorized to investigate the potential for impact to human health and the environment resulting from documented uncontrolled releases of organic and inorganic contaminants into the Calcasieu Estuary. This report is the result of three years of site characterization, data evaluation, technical analysis, and reporting, through the cooperation of numerous federal and state agencies which include: EPA, U.S. Fish and Wildlife Service (USFWS), National Oceanic and Atmospheric Administration (NOAA), U.S. Geological Survey (USGS), and the Louisiana Department of Environmental Quality.

These documents contains the draft and final Remedial Investigation for the Calcasieu Estuary site, finalized in 2003. 

Calcasieu Estuary Final Remedial Investigation (pdf) (8.06 MB, August 2003, 90044190)

Draft Calcasieu Estuary Remedial Investigation (pdf) (366.25 MB, November 2002, 926197)

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Last updated on August 2, 2024
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