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Air Quality Index (AQI)

Current Regional AQI Map for Midwest   
AQI Logo
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Provided by:
EPA - AIRNow

Current National AQI Map   
AQI Logo
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Provided by:
EPA - AIRNow

Animated Regional AQI Map for Midwest   
AQI Logo
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Provided by:
EPA - AIRNow

Animated National AQI Map   
AQI Logo
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Provided by:
EPA - AIRNow

AQI Explained

The AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur dioxide, and nitrogen dioxide. For each of these pollutants, EPA has established national air quality standards to protect public health .Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.

Visit EPA's AIRNOW website for additional information.


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