The allergens risk remained very low through most of the past 12 weeks but has shown a sharp increase in the current week, indicating a recent surge in allergy-related concerns.
Allergy risk levels are based on pollen counts, mold spore measurements, and air quality data from monitoring stations. The index reflects the combined burden of tree, grass, and weed pollen along with indoor/outdoor mold activity.
Data is updated daily during high-pollen seasons and every 2–3 days during winter months.
Sources: AAAAI pollen stations, NAB, EPA AirNow, Hubbub World allergy model
Last updated: May 24, 2026
Data refreshed weekly
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