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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

March 2019

Date Ash Elm Fungus Grass Juniper Maple Mulberry Oak Pine
Mar 10162,4030770000
Mar 2003,1780460000
Mar 30162,248000000
Mar 4001,937000000
Mar 5002,403000000
Mar 6003,643000000
Mar 70463,9530620000
Mar 80464,5731669316208
Mar 90464,88306223000
Mar 100936,1240108466200
Mar 11004,03101084601616
Mar 120775,116093310230
Mar 130314,108042160031
Mar 140624,1863177540160
Mar 150465,1160774606216
Mar 160234,03100460160
Mar 170776,0460311240230
Mar 180625,813077460310
Mar 1916625,503046232077186
Mar 20231085,193023218606277
Mar 21000000000

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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.