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Air Quality permits under review

  • 4/8/2021 11:52:00 AM
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DES MOINES – The DNR Air Quality Bureau has the following draft permits up for review. The permits help protect Iowans’ health and air quality. DNR’s permitting staff review each permit application to ensure facilities comply with state and federal air quality requirements. We encourage public comments on draft permits, providing help on how to make effective comments. Submit written comments to the assigned permit writer before 4:30 p.m. on the last day of the comment period. DNR considers public comments before finalizing the permits.

Title V Operating Permits
Title V Operating permits are reviewed and re-issued every five years. Facilities with a Title V permit have the potential to emit large amounts of air pollutants compared to other facilities. The five-year reviews are a federal requirement and ensure adequate monitoring is included in the permit. The DNR plans to issue Title V Operating Permits for the following facilities. Find permit details at

Mahaska County
Clow Valve Company – Machine Shop – 902 S Second St., Oskaloosa.
The application was submitted to operate their existing Valves and Pipe Fittings, NEC facility. The public comment period ends May 8. 

Des Moines County
United States Gypsum – 13425 210th St., Mediapolis.
The application was submitted to operate their existing Gypsum Products facility. The public comment period ends May 8.

Dubuque County
Dubuque Metropolitan Sanitary Landfill – 14501 US Hwy. 20 W, Dubuque.
The application was submitted to operate their existing Refuse Systems facility. The public comment period ends May 8.

Construction Permits
DNR engineers review and issue construction permits to facilities before they build new or modify existing sources of air pollution. The public may review the following air quality construction permits available online at OR through the EASY Air Public Inquiry Portal and then click the Public Notice tab.

Grundy County
Cargill Incorporated – 17540 Monroe-Wapello Road, Eddyville.
Cargill Incorporated operates a wet corn mill in Eddyville. In project 21-085, Cargill requested to replace some of the separation equipment in the solvent extraction process in the citric acid plant. The public comment period ends at 4:30 p.m. on May 7.

Muscatine County
Grain Processing Corporation – 1600 Oregon St., Muscatine.
Project No. 21-058, Permit modification for Maltrin Spray Dryer #6 (EU3116.0) to install new low emissions burner system (EU3116.1). The public comment period ends May 8.