Indiana Department of Environmental Management (IDEM) Office of Air Quality
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Indiana is authorized by the U.S. Environmental Protection Agency (EPA) to administer its own air emissions permit program. Indiana requires new and modified sources of air pollution to be permitted. A construction permit must be obtained before the modification of an existing source or installation of a new source. Upon completion of the construction permit, the facility is required to obtain an operating permit. Major sources must comply with nonattainment New Source Review (NSR) and/or Prevention of Significant Deterioration (PSD), as well as Title V permitting ...