The Environmental Protection Agency (EPA) is approving the Clean Air Act (CAA) state plan revision for existing large and small municipal waste combustors (MWCs) submitted by the New Hampshire Department of Environmental Services (NHDES) on October 1, 2018. The revised state plan incorporates fuel quality standards and test methods for large MWC facilities that combust processed wood residue (PWR) from construction and demolition (C&D) debris.

The Environmental Protection Agency (EPA) is proposing an approval and a limited approval and limited disapproval of a revision to the Mojave Desert Air Quality Management District (MDAQMD or ``District'') portion of the California State Implementation Plan (SIP). We are proposing approval of five rules and a limited approval and limited disapproval of five rules. These revisions concern the District's New Source Review (NSR) permitting program for new and modified sources of air pollution under part D of title I of the Clean Air Act (CAA or ``Act'').

The Environmental Protection Agency (EPA) is finalizing approval of regulatory amendments submitted by the State of Colorado on May 13, 2020. The revisions make limited amendments to the State's New Source Review (NSR) and Air Pollution Emission Notices (APEN). The EPA is taking this action pursuant to the Clean Air Act (CAA).

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving revisions to the New Mexico State Implementation Plan (SIP) submitted by the State of New Mexico on August 10, 2021, that update the New Mexico Nonattainment New Source Review (NNSR) permitting program for the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS).