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Title:	Board Adopts “Identical-in-Substance” Amendments to Ambient Air Quality Standards
Summary:	On October 5, 2023, the Board adopted amendments to keep Illinois’ ambient air quality standards identical in substance to the National Ambient Air Quality Standards (NAAQS). The amendments reflect one action taken by the United States Environmental Protection Agency (USEPA) during the second half of 2022. Specifically, USEPA updated its List of Designated Reference and Equivalent Methods to modify existing method designations and designated a new Federal Equivalent Method (FEM) for fine particulate matter (PM2.5) in ambient air.
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Handle:	Document-109149
Owner:	Site Administrator (User-2, admin:DocuShare)^DS
Create Date:	Tuesday, October 17, 2023 09:23:24 AM CDT
Modified Date:	Tuesday, October 17, 2023 09:24:46 AM CDT
Modified By:	Site Administrator (User-2, admin:DocuShare)^DS
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Content Type:	Adobe Portable Document Format (.pdf) - application/pdf
File name:	Board Adopts “Identical-in-Substance” Amendments to Ambient Air Quality Standards10052023.pdf
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Appears In:	Calendar years 2021-2023
Preferred Version:	Board Adopts “Identical-in-Substance” Amendments to Ambient Air Quality Standards10052023.pdf