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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 2019

Date Elm Fungus Grass Juniper Maple Oak Pine Willow
May 108,68231001600
May 208,99216031000
May 3167,59616062000
May 408,52723031000
May 52396946031000
May 607,829230463100
May 709,844108016000
May 807,5194600000
May 900000000
May 1009,5347700000
May 1107,829000000
May 1207,0543100000
May 13010,232124031000
May 1409,9227700000
May 15011,4721621600230
May 16011,08510800000
May 17168,75977230000
May 1800000000
May 1908,5273100000
May 20011,2401393100230
May 21011,24093000023
May 22010,4657700000
May 2308,5276200000
May 24010,387000000

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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.