Illinois landscape

Illinois

Population: 12.5M Updated Aug 31, 2026
Health Risks

Infectious Diseases Risk

Moderate
→ Stable

Infectious Diseases is Low in Springfield, Bloomington, and Peoria, and Moderate in Chicago.

Allergy

Extreme
↓ Decreasing

Allergy is Low in Bloomington, Moderate in Springfield and Peoria, and Extreme in Chicago.

Pollution

Low
→ Stable

Pollution is Low in Chicago, Springfield, Bloomington, and Peoria.

Severe Weather

Low
→ Stable

Severe Weather is Low in Chicago, Springfield, Bloomington, and Peoria.
Counties
Adams Alexander Bond Boone Brown Bureau Calhoun Carroll Cass Champaign Christian Clark Clay Clinton Coles Cook Crawford Cumberland De Witt DeKalb Douglas DuPage Edgar Edwards Effingham Fayette Ford Franklin Fulton Gallatin Greene Grundy Hamilton Hancock Hardin Henderson Henry Iroquois Jackson Jasper Jefferson Jersey Jo Daviess Johnson Kane Kankakee Kendall Knox La Salle Lake Lawrence Lee Livingston Logan Macon Macoupin Madison Marion Marshall Mason Massac McDonough McHenry McLean Menard Mercer Monroe Montgomery Morgan Moultrie Ogle Peoria Perry Piatt Pike Pope Pulaski Putnam Randolph Richland Rock Island Saline Sangamon Schuyler Scott Shelby St. Clair Stark Stephenson Tazewell Union Vermilion Wabash Warren Washington Wayne White Whiteside Will Williamson Winnebago Woodford
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.

Frequently Asked Questions

What health risks does Hubbub World track for Illinois?
Hubbub World tracks seven health risks for Illinois: flu, COVID-19, RSV, infectious diseases overall, seasonal allergies, air pollution, and severe weather. Each risk is broken out by county and updated weekly. For today's risk levels and 30-day forecasts, get the bub app at https://bub.hubbubworld.com.
How often is Illinois health risk data updated?
Health risk data for Illinois is regenerated weekly. Each hub page shows the six most recent weekly snapshots — the most recently completed week and the five preceding weeks. Today's risk levels and 30-day forecasts are not on the web; they are exclusive to the bub app at https://bub.hubbubworld.com.
What methodology does Hubbub World use?
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 today's health risk data for Illinois?
Today's health risk levels and 30-day forecasts for Illinois are exclusive to the bub app, available free on iOS, Android, and Apple Watch at https://bub.hubbubworld.com. The web hub is the historical archive — for live data and forward-looking forecasts, the bub app is the source of truth.
Does Hubbub World cover counties in Illinois?
Yes. Hubbub World tracks every county (and county-equivalent) in Illinois, with weekly historical risk data for each. County pages are linked from this state page. For today's data and 30-day forecasts at the county level, get the bub app at https://bub.hubbubworld.com.

Last updated: August 31, 2026

Data refreshed weekly

Get today's Illinois health risks — Download bub