Air Plan Approval; Pennsylvania; Allegheny County Area Fine Particulate Matter Clean Data Determination
The Environmental Protection Agency (EPA) is proposing to determine that the Allegheny County, Pennsylvania nonattainment area has clean data for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). This proposed clean data determination (CDD) under EPA's Clean Data Policy is based upon quality-assured, quality-controlled, and certified ambient air quality monitoring data showing that the area has attained the 2012 PM<INF>2.5</INF> NAAQS based on 2018-2020 data available in EPA's Air Quality System (AQS) database. Based on the proposed clean data determination, EPA is also proposing to determine that the requirements for Pennsylvania to make submissions to meet certain Clean Air Act (CAA or the Act) requirements related to attainment of the NAAQS for this area are not applicable for as long as the area continues to attain the 2012 annual PM<INF>2.5</INF> NAAQS. This action is being taken under the CAA.