Pollen Count

Trees | Grasses | Weeds | Ragweed | Molds
The previous Aeroallergen Network calculations are based on the data (per cubic meter) reported by all certified counting stations for trees, grasses, weeds and molds.

  • Median or 50th percentile (half of counts are below this point)
  • 75th percentile (75% of counts are below this point)
  • 99th percentile (99% of counts are below this point)


Based on these calculations, the National Allergy Bureau has set the following definitions for low, moderate, high and very high concentration levels:

National Allergy Bureau Scale
* MOLD
0 Absent
1 - 6499 Low
6500 - 12999 Moderate
13000 - 49999 High
>50000 Very High
GRASS
0 Absent
1 - 4 Low
5 - 19 Moderate
20 - 199 High
>200 Very High
TREE
0 Absent
1 - 14 Low
15 - 89 Moderate
90 - 1499 High
>1500 Very High
WEED
0 Absent
1 - 9 Low
10 - 49 Moderate
50 - 499 High
>500 Very High


 

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No Pollen Data