A group of environmental community groups, including Air Alliance Houston, California Communities Against Toxics, and the Coalition for a Safe Environment, filed a complaint against the Environmental Protection Agency September 27 in the U.S. District Court for the District of Columbia for its failure to review air toxics standards for petroleum refineries as required by the Clean Air Act. The complaint cites data from the Environmental Protection Agency showing that there are 150 refineries in 32 states that emit 20,000 tons of air toxics a year.