Air Plan Approval; Illinois; Second Maintenance Plan for 1997 Ozone NAAQS; Jersey County Portion of St. Louis Missouri-Illinois Area
Primary source
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Issuing agencies
Abstract
The Environmental Protection Agency (EPA) is approving, 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 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. EPA proposed to approve this action on March 14, 2023 and received no adverse comments.
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