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Two-thirds of all physician office visits are for ear, nose, throat or allergic problems!

Today’s Pollen Count

Pollen Archive

May 2022

Date Ash Cotton
Wood
Elm Fungus Grass Hackberry Maple Mulberry Oak Pine
May 1233108,217893620310
May 20000000000
May 38162312,09316627704631
May 4004610,38700770310
May 5004612,86831108770230
May 60089,9221677460160
May 71602311,55031062311646
May 8001610,5422309362310
May 90163114,651230624600
May 100000000000
May 111604612,868310077310
May 121603111,8602309362460
May 1300319,7674606293160
May 142303110,697460546200
May 150000000000
May 160000000000
May 1700629,61231016000
May 1800237,59631016000
May 19003111,0074600000
May 200000000000

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NAB: Reading the Charts

aaaai allergy pollen countsThe following 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, we suggest the following definitions for low, moderate, high and very high concentration levels:

NAB SCALE

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

 

* These mold levels were determined based on outdoor exposure to natural occurring spores in the environment and should not be applied to indoor exposure which may represent an entirely different spectrum of spore types.

These definitions would allow comparison between sites across the country. They are based on ecological measurements, not health effects. However, assuming dose/response relationships are the same across the country, the definitions are probably more appropriate than a definition based on local numbers. This does mean that, for some stations, some categories will never be high.