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Proposed Rule2023-05175

Air Plan Approval; Illinois; Second Maintenance Plan for 1997 Ozone NAAQS; Jersey County Portion of St. Louis Missouri-Illinois Area

Primary source

Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.

Published
March 14, 2023

Issuing agencies

Environmental Protection Agency

Abstract

The Environmental Protection Agency (EPA) is proposing to approve, as a revision to the Illinois State Implementation Plan (SIP), the state's plan for maintaining the 1997 ozone National Ambient Air Quality Standard (NAAQS or standard) through 2032 in the St. Louis, MO- IL area. The original St. Louis nonattainment area for the 1997 ozone standard included Jersey, Madison, Monroe, and St. Clair Counties in Illinois and Franklin, Jefferson, St. Charles and St. Louis Counties and St. Louis City in Missouri. The SIP submitted by the Illinois Environmental Protection Agency (IEPA) on August 24, 2022, addresses the second maintenance plan required for Jersey County, Illinois.

Indexed from Federal Register on March 14, 2023.

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