March 24, 2010 – Federal Register Recent Federal Regulation Documents

In this action, EPA is amending the transportation conformity rule to finalize provisions that were proposed on May 15, 2009. These amendments primarily affect conformity's implementation in PM2.5 and PM10 nonattainment and maintenance areas. EPA is updating the transportation conformity regulation in light of an October 17, 2006 final rule that strengthened the 24-hour PM2.5 national ambient air quality standard (NAAQS) and revoked the annual PM10 NAAQS. In addition, EPA is