Air Permits in Indiana

Air permits are required for many businesses that have the potential to release waste gasses or particles into the air. An air permit includes all air pollution regulations and requirements needed protect human health and the environment. This website is designed to connect you to basic information as well as useful resources. Use it to find information about:

• who needs an permit,
• regulated air pollutants,
• types of permits/air permitting programs,
• air permit timeframes and fees,
• air permit laws, rules and policies,
• how to participate in air permit decisions,
• applicant assistance and resources,
• the air permit application process,
• air permit application status and pending and issued permits,
• permit revocation due to inactivity, abandonment, and/or nonpayment,
• air permit ownership transfer or company name change
• responsible official/authorized individual change

List of Currently Permitted Sources: Updated 06/03/2025

IDEM's Office of Air Quality (OAQ) has prepared a list of currently permitted sources [XLSX] in Indiana. These sources are permitted to construct and/or operate under an/a:

• Air permit
• Source Specific Operating Agreement (SSOA)
• Permit By Rule (PBR)
• Registration, or
• Exemption

This list of sources will be updated at least once per quarter. Please note that some currently permitted sources may not have yet begun construction or operation; some may be under construction; some may not be operating; some may be temporarily closed; some may have been removed from the property; and some (i.e., portable sources) may have been relocated to a new property.