Minor Source Emissions Inventory

Facilities not subject to the Title V Operating Permit Program are required to submit minor source emissions inventories once every three years. The State of Iowa is split into thirds (eastern, central, and western) to stagger the number of inventories reviewed and quality-assured in a given year. In addition, emissions inventories from all portable plants in Iowa are collected at the same time as the facilities which are located in the central third of Iowa.


Minor Source Emissions Inventory Submission Schedule
Section of the State Inventoried Emission Year Inventory Due
Central (Field Office 2 and Field Office 5) 2019 May 15, 2020
West (Field Office 3 and Field Office 4) 2020 May 15, 2021
East (Field Office 1 and Field Office 6) 2021 May 15, 2022
Minor Source Emissions Inventory Assistance

Iowa Department of Natural Resources
The following is a list of contacts within the Iowa DNR Air Quality Bureau who can be contacted for help in completing the Minor Source Emissions Inventory:


Iowa Waste Reduction Center
The Iowa Waste Reduction Center provides free training to facilities with less than 100 employees. Their contact information is as follows:


Request Help
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Alternatively, call the Emissions Inventory staff listed on the left or email sleis@dnr.iowa.gov.