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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 2018

Date Elm Fungus Grass Pigweed Ragweed
Sep 107,906000
Sep 207,05401646
Sep 300000
Sep 408,1390016
Sep 509,9220031
Sep 609,4570046
Sep 7010,387000
Sep 809,922000
Sep 9011,240000
Sep 10010,4650016
Sep 111611,317160100
Sep 12010,775000
Sep 133112,6350085
Sep 14011,9370093
Sep 15169,76700108
Sep 1600000
Sep 17011,31700124
Sep 18859,30200124
Sep 19319,14701677
Sep 2007,82900139
Sep 2107,1310077
Sep 2205,891000
Sep 2307,984000
Sep 2400000
Sep 2508,9140046
Sep 2608,52700155
Sep 27169,534031170
Sep 2800000
Sep 299312,24800201
Sep 307713,02300217

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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.