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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

August 2019

Date Elm Fungus Grass Pigweed Ragweed Russian
Thistle
Aug 104,7280000
Aug 203,7200000
Aug 306,8990000
Aug 404,8060000
Aug 586,12416000
Aug 605,8910000
Aug 706,8990000
Aug 807,4410000
Aug 908,2170000
Aug 1007,829160077
Aug 1106,279233100
Aug 12000000
Aug 1305,8910000
Aug 14000000
Aug 1505,65801600
Aug 1606,8990000
Aug 1705,8918000
Aug 18000000
Aug 1905,0380000
Aug 2004,496031160
Aug 2104,1010000
Aug 2204,4180000
Aug 2303,79803100
Aug 2404,4960000
Aug 25000000

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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.