Air Plan Approval; Maryland; Philadelphia Area Base Year Inventory for the 2015 Ozone National Ambient Air Quality Standard

Publication Date: 
Friday, January 14, 2022 - 4:00am

The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of Maryland. This revision consists of the base year inventory for the Maryland portion of the Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE marginal nonattainment area (Philadelphia Area) for the 2015 ozone national ambient air quality standard (NAAQS). This action is being taken under the Clean Air Act (CAA).

Environmental Protection Agency