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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 2018

Date Ash Elm Fungus Grass Juniper Maple Mulberry Oak Pine
Apr 1000000000
Apr 20316,51100232139046
Apr 316315,503310325248628
Apr 416466,35616018677310
Apr 5005,58100248170016
Apr 63105,348003872326246
Apr 7004,34180774600
Apr 8003,2550031004662
Apr 90314,57307701244662
Apr 100313,953009302316
Apr 1138233,02346168212323131
Apr 1223163,72046063521710831
Apr 130314,5731161657301700
Apr 1423164,806124034120100
Apr 15000000000
Apr 16000000000
Apr 17004,031310248466231
Apr 18000000000
Apr 1931163,5650018677620
Apr 20004,80603124846310
Apr 210165,27100186622331
Apr 22004,263016980310
Apr 23005,1930015531023
Apr 2416235,8130012477046
Apr 250166,046009346160
Apr 26005,503310774600
Apr 27005,5033116460230
Apr 280314,03138381704600
Apr 29000000000
Apr 300315,11646006200

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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.