Federal Register #2026-13843

EPA Approval of Michigan's Air Quality Maintenance Plan and Redesignation for St. Clair SO2 Area

This EPA final rule addresses air quality management in southeast Michigan: - Government Buyer: - Environmental Protection Agency (EPA) - Action pertains to the State of Michigan, specifically the St. Clair area - OEMs and Vendors: - DTE Belle River Power Plant (emissions source with new regulatory limits) - Products/Services Requested: - No products or services are being procured; this is a regulatory action - Notable Requirements: - Approval of Michigan's request to redesignate the St. Clair SO2 nonattainment area to attainment for the 2010 SO2 NAAQS - Approval of Michigan's maintenance plan, which includes permanent and enforceable SO2 emission reductions - Incorporation of new SO2 emissions limits for the DTE Belle River Power Plant into the State Implementation Plan (SIP) - Closure of the St. Clair Power Plant as part of the maintenance plan - No adverse public comments received - No procurement or solicitation involved; this is a regulatory approval and not a contract opportunity

Description

The Environmental Protection Agency (EPA) is taking final action to redesignate the St. Clair nonattainment area in southeast Michigan to attainment for the 2010 sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS). The EPA is also approving Michigan's maintenance plan for the St. Clair SO2 nonattainment area and emissions limits for the DTE Belle River Power Plant. Michigan submitted the request for approval of the St. Clair area redesignation and maintenance plan on December 14, 2023, with a supplement on July 24, 2025. The EPA proposed to approve this action on April 10, 2026, and received no adverse comments. This final rule is effective on July 9, 2026.

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