A district court dismissed an environmental group's CAA citizens suit against EPA for failing to make a finding that Idaho and Utah failed to timely submit SIPs for fine particulate matter (PM2.5). In 2007, EPA issued a rule that required states to submit their SIPs for PM2.5 within three years afte...

The D.C. Circuit denied an electric utility association's petition for review challenging EPA's new source performance standards for steam generating units. The standards—issued via final rules in 2009 and again in 2012—exempt all units using particulate matter continuous emissions monitoring sy...