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Title:	Board Proposes “Identical-in-Substance” Amendments to Ambient Air Quality Standards
Summary:	On January 8, 2026, the Board proposed amendments to keep Illinois’ ambient air quality standards (35 Ill. Adm. Code 243) identical in substance to the National Ambient Air Quality Standards (NAAQS). The amendments reflect three actions taken by the United States Environmental Protection Agency (USEPA) during the 18-month period of July 1, 2024 through December 31, 2025.
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Handle:	Document-115049
Owner:	Site Administrator (User-2, admin:DocuShare)^DS
Create Date:	Tuesday, January 13, 2026 10:22:01 AM CST
Modified Date:	Tuesday, January 13, 2026 10:23:35 AM CST
Modified By:	Site Administrator (User-2, admin:DocuShare)^DS
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Content Type:	Adobe Portable Document Format (.pdf) - application/pdf
File name:	NewsBlurbR25-15consolJan8.2026.pdf
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Size:	135554
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Appears In:	News
Preferred Version:	NewsBlurbR25-15consolJan8.2026.pdf