Chicago
 
Data courtesy of:
 

 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
Local Air Quality Resources
Action Day Programs | Forecast | Real-time Ozone Data Program | Today's AQI
 
State Air Quality Resources
Illinois EPA - Air Quality Index (AQI)
Illinois EPA - Air Quality Information
Illinois EPA - Bureau of Air
Illinois EPA - Contact Information
Illinois Environmental Protection Agency (EPA)
Partners for Clean Air
Respiratory Health Association of Metropolitan Chicago
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Unhealthy for Sensitive Groups Unhealthy for Sensitive Groups
Health Message: People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion.
Air Quality Index (AQI)
Moderate Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5)
Unhealthy for Sensitive Groups
Unhealthy for Sensitive Groups
Ozone
Moderate
Moderate
Particles (PM2.5)
Moderate
Moderate
Ozone
Moderate
Moderate
Forecast Discussion: SPECIAL STATEMENT: Locally higher particulate levels can occur near and downwind of fireworks displays. Persons susceptible to elevated fine particulates should take precautions to avoid exposure to fireworks emissions.

Current Conditions
Air Quality Index (AQI)
observed at 12:00 CDT
153
Unhealthy
Health Message: People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion. Everyone else should reduce prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 153 Unhealthy
Ozone 47 Good

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