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Maryland sues petroleum companies over groundwater contamination

Maryland sues petroleum companies over groundwater contamination

Maryland has filed a lawsuit against more than 50 petroleum-related companies over groundwater pollution from a chemical compound that used to be common in gasoline.

The lawsuit, filed Wednesday in Baltimore City Circuit Court by Maryland Attorney General Brian E. Frosh’s office, alleges that ExxonMobil, Chevron, and dozens other companies knew a fuel additive called methyl tertiary butyl ether, or MTBE, would contaminate groundwater and tried to obstruct research about its harmful effects.

“Our water is a vital public resource and a source of drinking water for a large number of Maryland residents,” Frosh said in a statement. “These companies knew that the use and sale of...

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