Legal Alert - EPA Approves Maricopa County’s Five Percent Dust Plan


by Patrick J. Paul and Christopher P. Colyer

On May 30, 2014, the United States Environmental Protection Agency (EPA) approved Maricopa County’s proposed plan to meet federal air quality standards for particulate matter measuring ten microns or less (i.e., dust), known as PM-10. The approval of the plan—titled the 2012 Five Percent Plan for PM-10 in the Maricopa County Non-Attainment Area (the Five Percent Plan)—is a significant accomplishment for Arizona, Maricopa County and local businesses given Arizona’s previous inability to satisfy federal PM-10 standards since 1970.

[Read the full alert.]