COVID-19 in Washington
Low
COVID-19
Prevalence Trend
6-week history
Mar 16
Mar 23
Mar 30
Apr 6
Apr 13
Apr 20
Low
Moderate
High
Very High
↓ Decreasing
Summary
COVID-19 is Low in Seattle, Everett, and Tacoma.
Key Insights
High
Week of Mar 22
Low
Week of Apr 19
Trend
Decreasing
County Prevalence Map
Updated daily
County-level COVID-19 prevalence — Washington — Apr 20, 2026
Published by Hubbub World — health risk data for all US states and counties. Get the bub app for today's data and 30-day forecasts.
COVID-19 risk levels are calculated using a combination of reported case data, wastewater surveillance, and epidemiological modeling. Prevalence represents the estimated number of active infections per 100,000 population. Risk scores (0–10 scale) account for transmission dynamics, variant activity, and local healthcare capacity.
Data is updated daily for risk scores and weekly for prevalence trends. County-level maps are generated from state health department reports and CDC surveillance data.
Sources: CDC COVID Data Tracker, state health departments, Hubbub World epidemiological model
Frequently Asked Questions
What is COVID-19?
COVID-19 is a respiratory illness caused by SARS-CoV-2. It spreads primarily through respiratory droplets and can range from asymptomatic to severe. Hubbub World's COVID-19 risk score reflects the modeled burden of SARS-CoV-2 transmission in a given area, validated against CDC and HHS surveillance data.
How is COVID-19 risk measured in Washington?
COVID-19 risk in Washington is reported as a weekly score on a four-point scale: Low, Moderate, High, and Very High. The score reflects the modeled burden of COVID-19 across the state, validated against public health data from CDC, HHS, NOAA, and other authoritative sources. Methodology details are available at https://www.hubbubworld.com/intelligence#methodology.
What methodology does Hubbub World use to calculate COVID-19 risk?
Hubbub World develops proprietary models on top of the underlying surveillance, environmental, and weather data to produce comparable risk scores across all U.S. counties. Each of the seven risks is reported on a four-point scale (Low, Moderate, High, Very High) 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 Hubbub World 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 COVID-19 data for Washington?
Current COVID-19 risk levels and 30-day forecasts for Washington are exclusive to the bub app, available free on iOS, Android, and Apple Watch at https://bub.hubbubworld.com. This web page is the six-week historical archive — the bub app is where today's data and forecasts live.
Is COVID-19 seasonal in Washington?
Several of the risks Hubbub World tracks have a seasonal pattern in Washington — 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 calendar. COVID-19 risk in Washington is reported weekly so seasonal patterns are visible across the six-week archive on this page. For 30-day forward forecasts that show how seasonal patterns are evolving, get the bub app at https://bub.hubbubworld.com.
Last updated: April 20, 2026
Data refreshed weekly