Due to unforeseen circumstances, we are unable to post pollen counts this week. We hope to return to daily counts next week.

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Pollen Count for
Wednesday, May 31, 2023
TREES
755 High
GRASSES
84 High
WEEDS
0 Absent
MOLDS
N/A Not Applicable
Historical Pollen Average for
May 31st
TREES 248 MODERATE
GRASSES 28 MODERATE
WEEDS 10 MILD
MOLDS 8418 MODERATE
How are the pollen and mold counts determined? The counts are performed under a microscope from pollen and mold samples collected by an air sampler on the roof of our office in Greenfield. Unlike some pollen websites, we do not use historical or predicted data in our daily counts ‐ they are actual observations made by one of our staff. Pollen is sampled during the 24 hours before counting, so sudden changes in weather such as rain or wind may produce changes in pollen levels not yet shown in the count.
Historical Pollen and Mold Averages
Our historical averages are calculated from multi‐day rolling averages using data collected since 1995. Due to variations in weather and count availability, we have found that the rolling average method produces much more meaningful average counts than the calendar of single‐day historical averages that we used to provide. For full season graphs and comparison of past seasons, visit the Pollen Explorer.
© 2003-2023 Allergy, Asthma & Sinus Center, S.C. Pollen counts are made available as a public service without restriction for non-commercial use. Publishers, media and academic organizations may use pollen counts and related information free of charge, but attribution to the Allergy, Asthma & Sinus Center is required.