HENDERSON, Nev. (AP) - Federal officials say they've secured $1.1 billion to clean up a chemical in Henderson groundwater that was used to produce rocket fuel but can also cause birth defects.
The award announced Thursday by the U.S. Environmental Protection Agency is part of a $5 billion settlement with the Anadarko Petroleum Corporation. It's the largest settlement of its kind reached for environmental cleanup.
The government had initially sought $25 billion for damage left behind at sites across the country by the Kerr-McGee Corp., which Anadarko acquired in 2006.
The cleanup will address the country's largest plume of perchlorate, which contaminated Lake Mead.
State officials say more than 4,000 tons of perchlorate has already been removed from soil and groundwater, and it's no longer found at detectable levels in the lake.