Muscatine

Air quality exceedances fall sharply in 2015; Muscatine GPC pollution reduction main reason

The number of exceedances of National Ambient Air Quality Standards declined sharply in 2015 compared with 2014, due in large part to reductions in pollution emitted by Grain Processing Corporation's (GPC) corn-milling operations in Muscatine.

According to the Iowa Department of Natural Resources (IDNR) air quality report for 2015, 17 exceedances of the sulfur dioxide ambient air standards were recorded and 8 exceedances of the PM 2.5 (fine particulate) standard.

All 17 SO2 exceedances and one of the eight PM 2.5 exceedances occurred at Muscatine air monitors.

Grain Processing Corp. air pollution controls appear to be solving Muscatine sulfur dioxide problems

Clean air advocates hailed July 15 as "Clean Air Day for Muscatine" when Grain Processing Corporation (GPC) switched from coal to natural gas to fire its boilers.

The boiler conversion – plus a host of other pollution control improvements at the facility – now appear to be making a big difference in the city's air quality.

Exceedances of air quality standards in Iowa up in 2014; majority at Muscatine monitors

Iowa air monitors recorded 91 exceedances of National Ambient Air Quality Standards during 2014, with the vast majority (71) occurring at three locations in Muscatine.

Of the 76 exceedances of sulfur dioxide standards in the state, 66 were recorded in Muscatine at the Musser Park, Greenwood Cemetery and Muscatine High School air monitoring stations. Of the 15 exceedances of fine particulate matter (less than 2.5 microns) statewide, five occurred at Muscatine monitors.

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