pollen count
Noun
Meaning
the number of pollen grains (usually ragweed) in a standard volume of air over a twenty-four hour period and a specified time and place
Source: WordNetSynonyms
Hypernyms
Examples
If you live in an area with a high pollen count but aren't allergic to those particular pollens, you won't have a problem.
Occasionally you may have noticed a pollen count staying exactly the same a few days in a row.