IDEM projects it could save an estimated $17,000 per year by eliminating advertising costs in local newspapers.
A lawsuit could add Indiana to the Ozone Transport Region, a group of 11 states required by the EPA to reduce smog-causing pollutants.
The bill passed the Senate only after significant changes.
The American Lung Association's annual report indicates Indiana's annual air quality is improving.
While Indiana's air quality has improved, its ranking relative to other states has worsened.