2019-05285: Air Plan Approval; Illinois; Redesignation of the Illinois Portion of the St. Louis Area to Attainment of the 1997 Annual Standard for Fine Particulate Matter
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On December 6, 2018, the Illinois Environmental Protection Agency (Illinois) submitted a request for the Environmental Protection Agency (EPA) to redesignate the Illinois portion of the St. Louis, MO- IL nonattainment area (hereafter, "St. Louis area") to attainment for the 1997 fine particulate matter (PM<INF>2.5</INF>) annual national ambient air quality standard (NAAQS or standard). The Illinois portion of the St. Louis area includes Madison, Monroe, and St. Clair counties, and Baldwin Township in Randolph County. EPA is taking this action because it has determined that the St. Louis area is attaining the annual 1997 PM<INF>2.5</INF> standard based on the most recent three years of certified air quality data. EPA is also proposing to approve a revision to the Illinois state implementation plan (SIP) for maintaining the 1997 annual PM<INF>2.5</INF> NAAQS through 2030. Illinois' maintenance plan submission includes an updated emission inventory, which includes emission inventories for PM<INF>2.5</INF>, NO<INF>X</INF>, volatile organic compounds (VOCs) and ammonia. The maintenance plan submission also includes motor vehicle emission budgets (MVEBs) for the mobile source contribution of PM<INF>2.5</INF> and nitrogen oxides (NO<INF>X</INF>) to the St. Louis PM<INF>2.5</INF> area for transportation conformity purposes. EPA is proposing to approve and update both the emissions inventory and MVEBs. EPA is proposing to take these actions in accordance with the Clean Air Act (CAA) and EPA's SIP rules regarding the 1997 PM<INF>2.5</INF> NAAQS.
The agency’s own summary, as published.
What this changes
Amends 2 parts of the Code of Federal Regulations — the standing rules this notice rewrites.
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