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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

April 2019

Date Ash Elm Fungus Grass Hickory Juniper Maple Mulberry Oak Pine Walnut
Apr 1771705,426160034140313900
Apr 20935,27116004185427700
Apr 300000000000
Apr 400000000000
Apr 500000000000
Apr 600000000000
Apr 700000000000
Apr 800000000000
Apr 900000000000
Apr 106205,8913106226318677460
Apr 1131776,511160026334110800
Apr 1201556,124460463,4100124031
Apr 13006,8210007704600
Apr 140779,37931460325023200
Apr 1500000000000
Apr 1600000000000
Apr 1746627,4411600697263773116
Apr 180238,682160037203100
Apr 190627,9841603134101394616
Apr 200777,05431016310023160
Apr 210466,744160162633177230
Apr 220626,8212300186774600
Apr 230166,124002318607700
Apr 240167,8298046403776200
Apr 250167,51946023139062310

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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.