Oregon landscape

Allergy in Oregon

Population: 4.2M Updated Oct 14, 2026
Low
Allergy

Prevalence Trend

4-week history
Sep 20 Oct 4 Oct 11
Low
Moderate
High
Very High
Extreme
↓ Decreasing

Summary

Allergy prevalence is Low in Salem, Portland, and Eugene.

Key Insights

High
40.2 (Week of Sep 20)
Low
0.0 (Week of Oct 4)
Trend
Decreasing

County Prevalence Map

Updated daily
Oregon county-level Allergy prevalence map
County-level Allergy prevalence — Oregon — Oct 14, 2026
Published by Hubbub World — nationwide health risk monitoring.
Get the bub app for real-time risks, forecasts and alerts.

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

Frequently Asked Questions

What does Allergy measure?
Allergy prevalence is the number of people impacted by allergens from trees, grasses and weeds, and from mold spores in a neighborhood. It gives an idea of how many people are suffering from seasonal allergies in an area at a given time.
How is Allergy prevalence reported in Oregon?
Allergy prevalence in Oregon is reported as the peak weekly score of how many people are impacted in a neighborhood, on a five-point scale: Low (<5), Moderate (5–15), High (15–25), Very High (25–40) and Extreme (>40). The score reflects the highest number of people impacted by Allergy across neighborhoods in the state, validated against public health data from CDC, HHS, EPA, NOAA, and other authoritative sources. Methodology details are available at https://www.hubbubworld.com/intelligence#methodology.
What methodology does Hubbub use to calculate Allergy prevalence?
Hubbub develops proprietary models on top of geographic, demographic, environmental, surveillance and weather data to produce prevalence scores across the U.S. Prevalence is reported on a five-point scale (Low, Moderate, High, Very High, Extreme) so the scores are interpretable without needing the raw underlying numbers. The full methodology — including the modeling approach, validation against authoritative sources, and known limitations — is documented at https://www.hubbubworld.com/intelligence#methodology. The health risk data on the Hubbub website is for informational purposes only and does not constitute medical advice. Always consult a healthcare professional for personal health decisions.
Where can I get current Allergy data for Oregon?
Current Allergy risk levels, forecasts and alerts for Oregon are exclusive to the bub app, available free on iOS, Android, and Apple Watch at https://bub.hubbubworld.com. This web page is the 4-week historical archive of prevalence — the bub app is where today's data and forecasts live.
Is Allergy seasonal in Oregon?
Several of the risks Hubbub tracks have a seasonal pattern in Oregon — flu and RSV typically peak in fall and winter, allergies vary with tree, grass, and weed pollen seasons, and severe weather risks shift with the seasons. Allergy prevalence in Oregon is reported weekly, so seasonal patterns are visible across the 4-week archive on this page. For forecasts that show how seasonal patterns are evolving, get the bub app at https://bub.hubbubworld.com.

Last updated: October 14, 2026

Data refreshed weekly

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