Energy & environment · 19/05/2023
EPA Determines Allegheny County Attained 2012 Annual PM 2.5 Standard by December 31, 2021
The Environmental Protection Agency (EPA) has determined that the Allegheny County, Pennsylvania, fine particulate matter nonattainment area attained the 2012 annual PM 2.5 national ambient air quality standards by its December 31, 2021, attainment date. The area remains nonattainment until redesignation.