Ninety-five percent of the oil spilled in Louisiana during hurricanes Katrina and Rita has been removed, evaporated or dissipated, according to the Federal Emergency Management Agency and the Louisiana Department of Environmental Quality.

The U.S. Coast Guard, which has led the oil recovery effort, has recovered nearly 3.9 million gallons of oil. More than 4 million gallons of oil has either evaporated or dissipated naturally, according to FEMA. About 404,000 gallons of oil, or 5 percent of the oil spilled, remains to be removed, according to FEMA.

The U.S. Environmental Protection Agency and the Louisiana DEQ are evaluating the environmental impact of the spill.

With more than 9 million gallons of oil spilled in Louisiana, the disaster approaches the magnitude of the Exxon Valdez oil spill in 1992, in which a tanker ran aground in Alaska, releasing 11 million gallons of oil, according to FEMA.