Facilities which qualify for a Small Source Operating Permit are those whose potential emissions exceed the major source thresholds for Title V, but whose actual emissions are less than fifty percent of the major source thresholds for every 12-month rolling period. By registering for a Small Source Operating Permit the owner agrees to limit plant-wide actual emissions of each regulated air pollutant to below fifty percent of the major source thresholds. Facilities eligible for a Small Source Operating Permit may also qualify for reduced record keeping requirements through classification as a "de minimus" emissions source (as defined in 567 IAC 22.300(4)).

For more information regarding Small Source Operating Permits and the exceptions to eligibility, please read the operating permits' Frequently Asked Questions. To view Construction or PSD permits, please go to the construction permits page and use one of the searches under "Find Construction Permits".

Below is a list of facilities currently registered for a Small Source Operating Permit: