Air Quality Index

The AQI is an index for reporting information about air quality. It tells you how clean or polluted your air is, and whatsteps you can take to protect your health. The AQI ranges from 0 to 500 and is based on the measured or estimated levels of five air pollutants regulated by the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide.

People who are sensitive to the effects of air pollutants may use the AQI to provide guidance regarding their level of physical activity and outdoor exertion. Sensitive people include: the elderly, people with respiratory and cardiovascular diseases, including adults and children with asthma, bronchitis, and respiratory infections, and people with cardiovascular disease.

Children may be especially vulnerable to exposure to air contaminants because they breathe more air per pound of body weight than an adult. In addition, the U.S. Centers for Disease Control and Prevention estimates that approximately 5 million children in the United States have asthma, and these children may experience asthma triggered by air pollution.

Regularly updated AQI forecasts for Minnesota:

Air quality information for the entire U.S:

Updated Tuesday, 11-Jun-2013 15:34:32 CDT