Air Quality Chart
Elevated particulate air monitoring data spikes may be caused by conditions such as insects, fog, snow, grass mowing, etc.
Dredged materials are primarily submerged under water to control emissions.
Please refer to the Actions Taken page for explanations of any elevated results. (Actions Taken)
Historical air monitoring data can be found on the US Army Corps of Engineers – Chicago District web site.
Note: if a CDF Contribution point is higher than Action Level then that part of the line will turn Red.