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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 2020

Date Elm Fungus Grass Pigweed Ragweed
Sep 10168,6040031
Sep 20010,542000
Sep 30014,108000
Sep 40011,31701623
Sep 5000000
Sep 601612,3250031
Sep 7000000
Sep 802310,2320046
Sep 9023213,178311654
Sep 100013,100000
Sep 11043412,8680077
Sep 12024811,08500124
Sep 13021712,248001,240
Sep 14000000
Sep 1503258,52703193
Sep 1602017,51901693
Sep 17063511,085310356
Sep 18032511,86000201
Sep 19031013,4101616573
Sep 20021712,55880372
Sep 21012411,085016279
Sep 2207710,46500139
Sep 2309311,627160217
Sep 2407711,1620093
Sep 25000000
Sep 260629,53400248
Sep 27012412,248031201
Sep 280469,76780232
Sep 290627,59600341
Sep 300469,84400310

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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.