Relating to toxic air contaminants; and declaring an emergency.

Authorizes Environmental Quality Commission to adopt program and rules to reduce public health risks from emissions of toxic air contaminants from individual stationary industrial and commercial air contamination sources. Authorizes commission to establish by rule pilot program for evaluating and controlling public health risks from toxic air contaminant emissions from multiple stationary air contamination sources. Allows Department of Environmental Quality, pursuant to rules adopted by commission, to regulate individual existing air contamination source under program or pilot program based on adjusted benchmark for excess noncancer risk. Sunsets January 1, 2029. Authorizes commission to establish fee applicable to certain air contamination sources to cover direct and indirect costs of developing and implementing individual air contamination source program and rules or pilot program . Provides that fees first become due and payable no earlier than July 1, 2019. Places temporary limits on fee increases. Sunsets temporary limits on January 2, 2024. Requires certain air contamination sources to pay to department one-time supplemental fee to pay expenses of department and commission in developing and implementing individual air contamination source program or pilot program. Sets forth supplemental fee to be paid based on permit type applicable to source. Limits certain biennial expenditures. Declares emergency, effective on passage.