567—21.15(455B) Episode criteria.
	21.15(1) Evaluation. Conditions justifying the proclamation of an air pollution alert, air pollution warning, or air pollution emergency shall be deemed to exist whenever the commission or the director determines that the meteorological conditions are such that the accumulation of air contaminants in any place is reaching, or has reached, levels that could, if sustained or exceeded, lead to a substantial threat to the health of persons.
	21.15(2) Air pollution forecast. Initial consideration of air pollution episode activities will be activated by receipt from the National Weather Service of an air pollution forecast. Receipt of such a forecast shall be the basis for activities such as, but not limited to, increased monitoring of the air contaminants in the area involved.
	21.15(3) Declaration. In making determinations for the declaration of an air pollution episode condition, the commission or the director will be guided by the criteria stated in the following paragraphs:
	a. 	Air pollution alert. The provisions for an air pollution alert as specified in 40 CFR Part 51, Appendix L, 1.1(b), are adopted by reference.
	b. 	Air pollution warning. The provisions for an air pollution warning as specified in 40 CFR Part 51, Appendix L, 1.1(c), are adopted by reference.
	c. 	Air pollution emergency. The provisions for air pollution emergency as specified in 40 CFR Part 51, Appendix L, 1.1(d), are adopted by reference.
	d. 	Termination. Once declared, any status reached by application of these criteria will remain in effect until the criteria for that level are no longer met. As meteorological factors and air contaminants change, an appropriate change in episode level will be declared.
[ARC 7950C, IAB 5/15/24, effective 6/19/24]