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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 2019

Date Elm Fungus Grass Pigweed Ragweed
Sep 107,596000
Sep 208,13901623
Sep 306,434000
Sep 406,279000
Sep 506,85903116
Sep 605,658000
Sep 74800162346
Sep 828610,930016209
Sep 92949,45700170
Sep 101247,596023201
Sep 11776,2790093
Sep 1206,589031155
Sep 1304,96100201
Sep 14775,65800139
Sep 15624,728016186
Sep 16465,50300186
Sep 1704,10800279
Sep 1805,503023217
Sep 19164,341031232
Sep 2005,193046263
Sep 2103,79800155
Sep 2204,72800325
Sep 2303,875016170
Sep 2403,17808263
Sep 2504,80600279
Sep 262326,511310511
Sep 271865,193160356
Sep 28774,341023325
Sep 291704,49600248
Sep 30774,5731623480

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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.