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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 2020

Date Ash Elm Fungus Grass Juniper Maple Oak Pine
May 101612,01512423623116
May 20011,317108062160
May 30011,017108046160
May 401611,86012409300
May 500000000
May 60168,68293077310
May 700000000
May 8007,6744603100
May 900000000
May 10008,13931046160
May 110167,364461631230
May 12006,7441602300
May 130237,9843103100
May 14008,37246016230
May 150169,7674603180
May 16005,968160000
May 17007,59680000
May 180319,379620463116
May 1902312,09362031160
May 2016014,96326302300
May 2104614,49612403100
May 220012,093124031160
May 2300000000
May 240012,8681550000
May 2500000000
May 260010,85200000
May 270015,968460000
May 280015,426620000
May 290014,031310000
May 300013,565620000
May 310011,550460000

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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.