HIGH
Pollen levels between 8.1 and 12.0 tend to affect most individuals who suffer from the pollen types of the season. Symptoms may become more severe during days with high pollen levels.

MEDIUM
Pollen levels between 4.1 and 8.0 will likely cause symptoms for many individuals who suffer from allergies to the predominant pollen types of the season.

LOW
Pollen levels between 0 and 4.0 tend to affect very few individuals among the allergy-suffering public.