Relating to hazardous substances; providing that this Act shall be referred to the people for their approval or rejection.

Lowers benchmark for excess lifetime cancer risk level for existing air contamination sources from 50 in one million to 25 in one million. Lowers Hazard Index number used for calculation of benchmark for excess noncancer risk for existing air contamination sources from 5 to 1. Repeals statute limiting local community right to know regulatory programs. Refers Act to people for their approval or rejection at next general election.