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IDEM
>
Programs
>
Office of Air Quality
> Air Attainment
The United States Environmental Protection Agency (U.S. EPA) Releases New Ozone Standard (March 12, 2008):
IDEM Map of Ozone Standard at 0.075 ppm (based on 2005-2007 Ozone Design Values) [PDF]
U.S. EPA Information on the Strengthened National Ambient Air Quality Standards for Ground-Level Ozone
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