Checking local air quality can help you plan your day. The charts below reflect the current air quality, as provided by the federal government's AirNow.gov website. During ozone season — from March 1 through October 31 — the index reflects ozone forecast conditions and current conditions based on data from Missouri’s Air Quality Index Reports for ozone and fine particulate matter. Real-time readings may change during the day, depending on weather conditions and levels of emissions, so it's a good idea to check them frequently.
Use the links below to access today's air quality forecast, tomorrow's forecast and real-time readings on EPA's Air Quality Index.
Understanding the Air Quality Index
EPA’s color-coded index chart below provides additional information regarding the various levels of health concerns. Numerical values of 100 or less on the Air Quality Index meets the federal standard for a pollutant, which EPA has set to protect public health.
| AQI Color | Level of Concern | Index Values | Description of Air Quality |
|---|---|---|---|
| Green | Good | 0 to 50 | Air quality is satisfactory, and air pollution poses little or no risk. |
| Yellow | Moderate | 51 to 100 | Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. |
| Orange | Unhealthy for Sensitive Groups | 101 to 150 | Members of sensitive groups may experience health effects. The general public is less likely to be affected. |
| Red | Unhealthy | 151 to 200 | Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. |
| Purple | Very Unhealthy | 201 to 300 | Health alert: The risk of health effects is increased for everyone. |
| Maroon | Hazardous | 301 and higher | Health warning of emergency conditions: everyone is more likely to be affected. |
Additional Information
- Agilaire is a tool that provides an alternative resource and map, which shows the air quality index for other pollutants that are not currently part of EPA's AirNow.gov.
- EnviroFlash is a service that sends out bulletins about air quality. You pick the bulletins you want. Choices include daily forecasts and/or notifications of action days — days forecasted orange to maroon on EPA's Air Quality Index.
Contact Information
Air Pollution Control Program
Division of Environmental Quality
P.O. Box 176
Jefferson City, MO 65102-0176
United States
