AQ Index for St. Charles County, Missouri

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Air Quality Index for St. Charles County, Missouri

The area with the highest AQ Index (as of 2:00 CST) in is in the Saint Louis area. Ozone (OZONE) is measuring at 27 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.

Over the next few days, the highest primary air pollutant will be Ozone (OZONE) in the Saint Louis area. It is forecasted to be 0 (Good), meaning air quality is satisfactory, and air pollution poses little or no risk.

Below is a clickable map of St. Charles County, Missouri. The markers on the map identify large, populated cities. If you hover over a marker, it will display the city name and the current AQ index. The color of the city markers also references the current AQ risk level.

Range0 - 5051 - 100101 - 150151 - 200201 - 300301 - 500
Color
CategoryGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardous

Last Updated 5 minutes ago

AQ Index Forecast by City in St. Charles County

Below is a list of cities in St. Charles County where we track and forecast the AQ index. Click on a city name to get the current AQ index as well as any available forcasts.

O Fallon St. Charles St. Peters Wentzville Lake St. Louis
Dardenne Prairie Weldon Spring Cottleville St. Paul Flint Hill
Josephville West Alton New Melle Portage Des Sioux Augusta
Weldon Spring Heights Defiance