Effective March 3, 2016, the Illinois Pollution Control Board (IPCB) adopted amendments to the Air Quality Standards (35 IAC 243; 40 Ill Reg. 152) to align the rules in 35 IAC Part 243 with the National Ambient Air Quality Standards (NAAQS) amendments adopted by the US Environmental Protection Agency (USEPA) between January 1, 2015 and November 19, 2015. The new amendments include the following updates:
- Revision of sunset provisions for the 1997 ozone NAAQS;
- More up-to-date list of designated methods for air quality testing; and
- NAAQS ozone standard reduced to 70 from 75 parts per billion (ppb).
Additional details on this rulemaking can be found on the IPCB website under Case Number: R2016-002.