Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 244 - EPISODES
Subpart D - EPISODE STAGES
Section 244.163 - Criteria for Declaring a Yellow Alert
Current through Register Vol. 48, No. 38, September 20, 2024
The Director or his/her designated representative shall declare a yellow alert whenever:
a) Any yellow alert level is equaled or exceeded at any monitoring station; and
b) An air pollution advisory has been in effect for 4 hours in the area for which the yellow alert is to be declared; and
c) Atmospheric conditions, or expected contaminant emissions, are such that concentrations can reasonably be expected to remain at or above the yellow alert level for 12 or more hours; or
d) For ozone, atmospheric conditions, or expected contaminant emissions, are such that concentrations can reasonably be expected to reoccur at a yellow alert level on the following calendar day.
