Safety of post-Katrina sludge is disputed

Floodwaters from Hurricane Katrina deposited arsenic, lead and petrochemical compounds across greater New Orleans in amounts that are potentially dangerous to human health despite federal and state assurances that the sludge is safe, according to a new study based on Environmental Protection Agency data. The study, which was conducted by the Natural Resources Defense Council (NRDC), urges the government to clean up the waste before permitting young children to return to the struggling city. Government officials have minimized the public health threat in New Orleans, the environmental group said. Louisiana officials have said some toxic contaminants have been found only on golf courses that use pesticides containing arsenic, but the NRDC report includes maps detailing dozens of high arsenic levels taken across wide swaths of the urban area. "State and some federal officials have been consistently denying there are any significant risks from the toxic mud that has spread across the city," said Erik Olson, a senior NRDC lawyer. "The data they themselves have collected show that, to the contrary, there are significant risks from arsenic and toxic chemicals that have blanketed much of New Orleans." Environmental activists are calling on government agencies to clean up contaminated sediment, test schools and playgrounds, and provide information and protective equipment to residential and business property owners. Many toxins are especially dangerous to children, and metals such as lead can stunt development. "Young children should not play in any areas where there is still sediment on the ground," wrote the report's authors, Gina M. Solomon and Miriam Rotkin-Ellman. "It would be best to keep children out of the city until cleanup has occurred."