The area with the highest AQ Index (as of 4:00 CST) in is in the Saint Louis area. Ozone (OZONE) is measuring at 31 (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 Franklin 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.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 14 minutes ago
Below is a list of cities in Franklin 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.
| Washington | Union | Pacific | Sullivan | St. Clair |
| Villa Ridge | New Haven | Gray Summit | Gerald | Lake Saint Clair |
| Parkway | Oak Grove Village | Stanton | Miramiguoa Park | Berger |
| Leslie | Charmwood |