On June 2, US EPA published a final rule that outlines the regulatory framework states must follow to implement the 1997 and 2006 standards for fine particulate matter, or PM2.5. The Rule was issued in response to a remand from the D.C. Circuit Court of Appeals in January 2013, which returned for correction a pair of rules … Continue Reading
On May 9, the Court of Appeals for the D.C. Circuit upheld US EPA’s rule revising the annual National Ambient Air Quality Standard (NAAQS) for fine particulate matter (PM2.5) despite serious concerns regarding how states and regulated entities are to proceed under new rules. The January 2013 final rule lowers the annual allowable limit for PM2.5, eliminates the option of “spatial … Continue Reading
