The federal Clean Air Act and State regulations continue to pursue emission reductions from gas industry sources. This annual session on air regulatory issues will cover the status, content, and potential impact of new U.S. EPA and State air regulations affecting gas industry facilities. Highlights will include key regulatory developments from the last year, including the final federal New Source Performance Standard (NSPS) for gas-fired reciprocating internal combustion engines, which addresses NOx, CO and VOC emissions. Related revisions to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for engines will also be discussed. In addition, the National Ambient Air Quality Standard (NAAQS) for ozone was lowered in March 2008. NOx emissions are regulated as an ozone precursor, and potential implications of the revised ozone NAAQS will be discussed. An update of greenhouse gas (GHG) emissions issues will be provided, including EPA plans to develop a GHG emissions reporting regulation. Each air quality issue will be summarized and related implementation issues will be discussed.