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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 2018

Date Ash Cotton
Wood
Elm Fungus Grass Juniper Maple Mulberry Oak Pine
May 100314,57377016000
May 20005,271770623100
May 300165,813770460160
May 40004,34131163801646
May 50004,806310230031
May 61662012,7903116124000
May 71646010,23262077000
May 807708,0624600000
May 909309,922124160000
May 1006208,6824600000
May 1104607,59631000016
May 1203107,9066200000
May 1302306,8994600000
May 1406207,1315400000
May 1503805,03831160000
May 1606206,1242300000
May 17031165,5033100000
May 1803105,1164600000
May 1901604,9613100000
May 200005,1163800000
May 210006,0462300000
May 22009312,790000000
May 2303108,6041600000
May 2404608,5271600000
May 250000000000

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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.