Regulation & law · 07/11/2013Updated: 10/17/2026 · 1 min read

EPA Approves Ohio's Plan to Maintain 1997 Fine Particulate Matter Standard in Columbus Area

The US Environmental Protection Agency (EPA) has approved Ohio's plan to maintain the 1997 annual fine particulate matter (PM 2.5) standard in the Columbus area, following a review of quality assured monitoring data from 2007 to 2012. The approval includes the redesignation of the Columbus area to attainment of the standard, as well as revisions to the state's implementation plan and emission budgets.