The Illinois Pollution Control Board (IPCB) has proposed amendments to the existing air quality standards for the state of Illinois, codified under 35 IAC Part 243.  This rule was published in the Illinois Register on January 4, 2016.  The intent of this proposed rule is to adopt the updates associated with the National Ambient Air Quality Standards (NAAQS) that occurred between January 1, 2015 and November 19, 2015.  The amendments put forth by the rulemaking, as published in the Illinois Register, are as follows:

  • Revise sunset and anti-backsliding provisions for the 1997 ozone (O3) NAAQS;
  • Designate one new federal reference method (FRM) and one new federal equivalent method (FEM) for particulate matter (PM) less than 2.5 microns (PM2.5), one new FEM for PM10-2.5 and two new FEMs for O3, and one new FRM for Carbon Monoxide (CO);
  • Update the list of designated FRMs and FEMs; and
  • Lower the O3 NAAQS from 75 parts per billion (ppb) to 70 ppb.

Written comments will be accepted by the IPCB for a period of 45-days after January 4, 2016 and one public hearing will be held on February 18, 2016 at 1:30 PM.  More information on this rulemaking, public comment and hearing can be found in Illinois Register (2016, Volume 40, Issue 1, page 152 – 174).