The Environmental Protection Agency (EPA) is finalizing the removal of the air pollution nuisance rule from the Ohio State Implementation Plan (SIP) using a Clean Air Act (CAA) error correction provision. EPA has determined that this rule was not relied upon by Ohio to demonstrate implementation, maintenance or enforcement of any national ambient air quality standard (NAAQS). Upon the effective date of this action, the nuisance rule will no longer be part of the Ohio SIP.

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Connecticut. This revision amends a Connecticut air-quality regulation for controlling particulate matter (PM) and visible emissions. The intended effect of this action is to define the process industries and activities to which this regulation applies, and to make technical corrections to an emission-rate calculation method. This action is being taken in accordance with the Clean Air Act.

The Environmental Protection Agency (EPA) is approving the State of South Dakota's January 15, 2020, State Implementation Plan (SIP) submission that addresses infrastructure requirements for the 2015 ozone National Ambient Air Quality Standards (NAAQS).

Pursuant to the Clean Air Act (CAA), the Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of Maine. On February 18, 2020, the State submitted its 1997 ozone national ambient air quality standards (NAAQS) Limited Maintenance Plans (LMPs) for the Portland and Midcoast areas. EPA is approving the Portland and Midcoast LMPs because they provide for the maintenance of the 1997 ozone NAAQS through the end of the second 10-year portion of the maintenance period.