Energy & environment · 16/07/2010

EPA Announces Attainment of PM10 Standard in Mendenhall Valley, Alaska

The U.S. Environmental Protection Agency (EPA) has confirmed that the Mendenhall Valley nonattainment area in Alaska met the National Ambient Air Quality Standard (NAAQS) for particulate matter with a diameter of 10 micrometers or less (PM10) as of December 31, 1995, marking a significant milestone in the region's air quality improvement efforts.