Ozone levels are expected to be in the unhealthy sensitive groups range, according to the National Weather Service.
Some Indiana mayors are urging to U.S. Environmental Protection Agency to take a stronger stand for clean air.
The American Lung Association's annual report indicates Indiana's annual air quality is improving.
Carmel mayor Jim Brainard is part of a White House task force to improve air quality across the country.
Indiana Department of Environmental Management is drawing criticism for its decision to no longer publish its notices on air quality issues in local newspapers.
While Indiana's air quality has improved, its ranking relative to other states has worsened.
IDEM Commissioner Tom Easterly spoke at length about a report on 25 years of progress in Indiana environmental conditions.
Opponents of a proposed coal-gasification plant in Edwardsport are putting together a suit to block the plant's construction.