35 Ill. Adm. Code 203.1270
Nonattainment Area
Section
203.1270Â Nonattainment Area
An area designated by the USEPA as nonattainment for a given
pollutant under section 107 of the CAA (42 U.S.C. 7407) in Subpart C of 40 CFR
Part 81.
35 Ill. Adm. Code 203.1270