High Tree pollen counts in the midwest

Photo micrograph of Oak/Maple pollen spores May 8, 2015 St. Paul MN - N. Carson - click to enlarge

There may be a reason that individuals with seasonal allergy/asthma are miserable.  Chicago station WLS reported that the Highest Tree Pollen Count in History Recorded for Midwest was noted by Dr. Joseph Leija on Friday May 1, 2015.  He measured 2,000 spores per cubic meter.





The last item piqued my interest and I check an Air-o-cell sample I took on May 8, 2013.  I measured 4,800 tree pollen per cubic meter of air on the St. Paul campus of the University of Minnesota.   Most of the pollen was either maple or oak.

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