Large Coalition Of States Sues EPA To Overturn Tougher PM NAAQS

A coalition of two dozen states -- 22 led by Republicans and two by Democrats -- is suing EPA to scrap the agency’s recently strengthened national ambient air quality standards (NAAQS) for fine particulate matter (PM2.5), in which EPA significantly toughened a key annual health-based limit for the pollutant. The states filed suit at the first opportunity March 6 in the U.S. Court of Appeals for the District of Columbia Circuit, the same day EPA published the rule in the...