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When Hurricane Katrina flooded the city of New Orleans, among the many concerns left in its wake was that of the contaminants that were released or exposed. Several chemical plants or petroleum refining facilities and contaminated sites, including superfund sites, lay within the area covered by floodwaters. As with any city, hundreds of commercial establishments such as service stations to pest control businesses to dry cleaners use potentially hazardous chemicals that may have been released into the environment by the floodwaters. Figure 1 shows the potential petroleum-related release points including refineries, oil and gas wells, and service stations near the city. Figure 2 shows the major hazardous material storage locations, Superfund sites and Toxic Release Inventory reporting facilities. Adding to these potential sources of toxics and environmental contaminants are the metal-contaminated soils typically associated with old urban areas, and construction lumber preserved in the semi-tropical climate with such chemicals as creosote, pentachlorphenol and arsenic. Compounding these concerns are the variety of common hazardous chemicals stored in flooded households and the fuel and motor oil in approximately 400,000 flooded automobiles. Further contributing to the pollutant burden in the city were uncontrolled biological wastes from both human and animal sources.

Toxic and Contaminant Concerns Generated by Hurricane Katrina