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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

September 2021

Date Elm Fungus Grass Pigweed Pine Ragweed Russian
Thistle
Sep 103,7970160230
Sep 20000000
Sep 302,71300000
Sep 402,3250160310
Sep 503,255016000
Sep 60000000
Sep 702,6350160460
Sep 883,488000460
Sep 902,868000620
Sep 1005,3480009346
Sep 1106,3560001080
Sep 1204,72800015531
Sep 1384,4180001390
Sep 14317,131160161310
Sep 1507,0540001860
Sep 1686,74400017016
Sep 17235,9680002170
Sep 1806,3540001390
Sep 19165,9680003250
Sep 2006,8990003250
Sep 21165,1160003720
Sep 2205,2710002480
Sep 2304,4960004340
Sep 240000000
Sep 25234,3410007900
Sep 26164,7280003720
Sep 2704,1860004340
Sep 2804,7280003250
Sep 2904,0310002480
Sep 3005,5810002790

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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.