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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 2017

Date Ash Cotton
Wood
Elm Fungus Grass Juniper Maple Mulberry Oak Pine
Apr 103102,713002320460
Apr 21646312,8682301,1316210846
Apr 300162,6351608520031
Apr 4162302,38531024346620
Apr 5310163,7980037203116
Apr 61623163,023003410310
Apr 7160313,565160310000
Apr 831002,6350032516230
Apr 91616233,48846093186310
Apr 1000163,72046012462016
Apr 1100162,352310620230
Apr 1200232,48062046000
Apr 1300163,4880077000
Apr 140002,8641606246310
Apr 150003,25531015546230
Apr 160000000000
Apr 170000000000
Apr 180085,73616000160
Apr 190004,728155031621616
Apr 2000314,03193016800
Apr 2100163,799771600230
Apr 220084,26346000016
Apr 2300313,4887700000
Apr 240004,4184600000
Apr 250003,64824800000
Apr 2600163,48817000000
Apr 270003,87520100000

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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.