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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

April 2021

Date Ash Elm Fungus Grass Juniper Maple Mulberry Oak Pine Sycamore
Apr 10168,527001392326200
Apr 2009,612062461863100
Apr 30000000000
Apr 40238,52701612424877310
Apr 50938,759002323416200
Apr 60778,527006223246310
Apr 70000000000
Apr 80988,682007723262160
Apr 9166046,821310961263170460
Apr 100000000000
Apr 11231706,43431055818677460
Apr 1201085,27116049618662310
Apr 130000000000
Apr 14312486,3561605427717000
Apr 150166,8990077623100
Apr 16006,124007731000
Apr 170629,37931032507700
Apr 188167,286002487798420
Apr 190000000000
Apr 2023318,9923103560139160
Apr 2123169,3790017006200
Apr 221607,5960077312300
Apr 236912410,23262034146155770
Apr 240000000000
Apr 25312310,2320023206200
Apr 260000000000
Apr 270011,08531013907700
Apr 2816010,38723012404600
Apr 290010,2320077016031
Apr 300000000000

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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.