A pollen count is generated by measuring the number of pollen grains in a given volume of air, using a pollen trap. In pollen counts, all pollen is treated the same. A count of 50 pollen grains or less is considered low, and a count of 1,000 pollen grains or more is considered high. The risk to you will depend on which plant pollens you are allergic to. Pollen count can significantly help to manage asthma and hay fever.