2019-10189: Approval of Missouri Air Quality Implementation Plans; Redesignation of the Missouri Portion of the St. Louis-St. Charles-Farmington, MO-IL 2012 PM2.5 Unclassifiable Area
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The Environmental Protection Agency (EPA) is proposing to approve a request from the Missouri Department of Natural Resources (MoDNR) to redesignate the Missouri portion of the St. Louis-St. Charles-Farmington, MO-IL fine particulate matter (PM<INF>2.5</INF>) unclassifiable area ("St. Louis area" or "area") to unclassifiable/ attainment for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). The Missouri portion of the St. Louis area comprises of the City of St. Louis and the counties of Franklin, Jefferson, St. Charles, and St. Louis. The EPA now has sufficient data to determine that the St. Louis area is in attainment of the 2012 PM<INF>2.5</INF> NAAQS. Therefore, EPA is proposing to approve the state's December 11, 2018 request, and redesignate the area to unclassifiable/attainment for the 2012 PM<INF>2.5</INF> NAAQS based upon valid, quality-assured, and certified ambient air monitoring data showing that the PM<INF>2.5</INF> monitors in the area are in compliance with the 2012 PM<INF>2.5</INF> NAAQS. The EPA will address the Illinois portion of the St. Louis area in a separate rulemaking action.
The agency’s own summary, as published.
What this changes
Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.
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