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Wildfire Haze Over Iowa Dissipates

Wildfire Haze Over Iowa Dissipates

  • 5/8/2016 1:16:00 PM
  • View Count 1411
The U.S. Environmental Protection Agency’s (EPA) 24-hour health threshold for PM2.5 is 35 micrograms per cubic meter (µg/m3).   Exceedances of this threshold were recorded at several monitoring sites in Iowa on Saturday.