The Environmental Protection Agency (EPA) is approving revisions to the open burning standards in the Ohio State Implementation Plan (SIP) under the Clean Air Act (CAA). On June 4, 2018, the Ohio Environmental Protection Agency (Ohio) requested the approval of its revised open burning rules, which include changes pertaining to certain types of open burning, adding requirements for air curtain burners, allowing law enforcement to burn seized drugs, further restricting the materials that may be burned, and updating definitions and references. Ohio is in attainment of the National Ambient Air Quality Standards (NAAQS) for particulate matter.