Background
The Butte area of the Matanuska-Susitna Borough has experienced elevated levels of fine particulate matter (PM2.5). Air quality monitoring data indicates that the area may exceed the PM2.5 National Ambient Air Quality Standard (NAAQS) of 35 micrograms/cubic meter. If the area continues to experience elevated levels of PM2.5, EPA may designate the area as a nonattainment area. Information on this page can help residents understand the issue and learn what actions they can take to improve air quality.
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