Air quality in United States
Air quality in Missouri today
Updated
Good: average US AQI 38 across 11 cities in Missouri Worst now: Saint Charles (42); cleanest: Oakville, MO (33).
Live US AQI, PM2.5 and ozone for cities across Missouri, compared with the United States average.
- Average US AQI
- 38 Good
- United States average
- 49 619 cities
- Most polluted now
- Saint Charles AQI 42
- Cleanest now
- Oakville, MO AQI 33
- Cities above 100
- 0
Air quality in Missouri today
Right now the modelled air quality in Missouri averages a US AQI of 38 (Good) across the 11 cities we track. By category: 11 Good (of 11).
That is 11 points cleaner than the United States average of 49, ranking 17 of 51 states from cleanest to most polluted.
Saint Charles has the worst air at 42 (PM2.5 6.9 µg/m³), and Oakville, MO the cleanest at 33. No tracked city is above 100, so no group needs to change plans.
Missouri cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Saint Charles | 42 | Good | 6.9 | 7 | 124 |
| Chesterfield | 42 | Good | 6.9 | 7 | 124 |
| Wildwood | 42 | Good | 2.8 | 3 | 130 |
| Springfield | 40 | Good | 2.2 | 2 | 118 |
| Kansas City | 37 | Good | 5.8 | 6 | 122 |
| Independence | 37 | Good | 5.8 | 6 | 122 |
| Joplin | 37 | Good | 3.5 | 4 | 115 |
| Jefferson City | 36 | Good | 1.6 | 2 | 115 |
| Columbia | 34 | Good | 2.4 | 2 | 114 |
| St. Louis | 33 | Good | 4.7 | 5 | 118 |
| Oakville | 33 | Good | 3.8 | 4 | 128 |
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.
Cities in Missouri
- Air quality in Kansas City
- Air quality in St. Louis
- Air quality in Springfield
- Air quality in Columbia
- Air quality in Independence
- Air quality in Saint Charles
- Air quality in Joplin
- Air quality in Chesterfield
- Air quality in Jefferson City
- Air quality in Oakville
- Air quality in Wildwood
- Air quality in Liberty
- Air quality in Gladstone
More
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).