1998 The Coalition joined with the Sierra Club in a lawsuit against the Environmental Protection Agency for failing to enforce clean air regulations in the St. Louis area; St. Louis had failed to meet the federal standards for ozone or smog since 1978.
2005 The Coalition won a 2004 lawsuit on behalf on two Herculaneum residents prompted by the EPA's failure to review lead air pollution standards every five years as required by the Clean Air Act.