Regulation & law · 13/10/2005

EPA Proposes Approval of Maryland's Air Quality Implementation Plan Revision

The Environmental Protection Agency (EPA) is proposing to approve a revision to Maryland's State Implementation Plan (SIP) that updates the state's ambient air quality standards for ozone and fine particulate matter, replacing the abbreviation 'ppm' with 'parts per million' in existing standards, in accordance with the Clean Air Act (CAA).