Current Missouri Air Quality Index (AQI)
Report For Kansas City, St. Louis And Springfield

This is raw data. It has not been validated and may contain errors.

  1. The data is obtained from automated, continuous instruments; no human has reviewed or checked the accuracy of this data.
  2. The data has been subject to only preliminary automated quality assurance procedures.
  3. Special conditions such as power outages and equipment malfunction can produce data that is invalid.
  4. This data is made available for the purpose of public awareness and should not be used in any medical or other scientific study.
  5. Quality assured data can be obtained by contacting the Missouri Department of Natural Resources Air Pollution Control Program. 

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Public Notice: The AQI is in transition.

Due to recent changes in the 2.5 particulate National Ambient Air Quality Standard and the time required to develop and formally adopt a new AQI regulation, the legally required 2.5 AQI posted here does not reflect the current scientific understanding of air quality health effects. As soon as a new 2.5 AQI regulation is adopted by the U.S. Environmental Protection Agency, the "official" AQI and the estimate posted here will be modernized. The new ozone AQI regulation is in place for the 2008 ozone season.

Users Guide

During the ozone season( April 1-October 31) The Current Air Quality Index Report (AQI) for Kansas City,  St. Louis and Springfield areas is updated hourly every day between 6 a.m. and 9 p.m.Central Standard Time. The update times are approximately 20 minutes after the hour. During the rest of the year this report is updated at least twice a day. All data is recorded using Central Standard Time, regardless of local time changes to daylight-saving time.

This report, using current real time data, is an approximation of the official Air Quality Index for today.  The Official Complete AQI(See Below) for any day cannot be calculated until all air pollutant data for that day is available (approximately 8 a.m. the following day).

During the ozone season (April 1 to October 31) this real time AQI report is used as the basis for the Ozone Action Day programs in the St. Louis and Kansas City areas. An index of 100 represents a threshold level of pollution, which may cause health problems in normally healthy humans. However, sensitive individuals or highly active individuals may experience health effects at lower concentrations of pollutants.

Also available:

link to AQM beginning.
Beginning 		link to Current AQI.
Index 		Link to Current Data.
Current Data 		Link to site map.
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