The U.S. Environmental Protection Agency is proposing to approve Arizona’s air quality plan to control sulfur dioxide (SO2) and soot at the Cholla, Apache and Coronado coal-fired power plants. EPA is also proposing additional pollution controls for nitrogen oxide (NOx) at those plants.
The proposal is designed to cut NOx emissions by 7,800 tons per year (tpy) at the Cholla plant, 4,700 tpy at Apache and 4,500 tpy at Coronado to help improve visibility at 18 national parks and wilderness areas, including the Grand Canyon, under the Clean Air Act.
EPA is soliciting public comments on the proposal through August 31, and will host a public workshop and hearing Tuesday, July 31 in Phoenix. The deadline for final EPA action is November 15, 2012.
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