Be the first to measure and contribute air quality data to your community
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in Saint-Louis
Air quality index (AQI) and PM2.5 air pollution in Saint-Louis
189 people follow this city
Saint-Louis Air Quality Map
Real-time Saint-Louis air pollution map
AIR QUALITY DATA SOURCE
* AQI modeled using satellite data Learn more
Weather
What is the current weather in Saint-Louis?
| Weather | Clear sky |
| Temperature | 73.4°F |
| Humidity | 78% |
| Wind | 9.2 mp/h |
| Pressure | 29.8 Hg |
3D animated air pollution map
US AQI
156*
live AQI index
Unhealthy
Overview
What is the current air quality in Saint-Louis?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Unhealthy | 156* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 62.5*µg/m³ | |
!
PM2.5
x12.5
PM2.5 concentration in Saint-Louis is currently 12.5 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Saint-Louis?
 | Avoid outdoor exercise |
 | Close your windows to avoid dirty outdoor air GET A MONITOR |
 | Wear a mask outdoors GET A MASK |
 | Run an air purifier GET AN AIR PURIFIER |
Forecast
Saint-Louis air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Today | Unhealthy 156 AQI US |  | 77° 69.8° |  20.1 mp/h |
| Tuesday, May 21 | Unhealthy for sensitive groups 147 AQI US  |  | 78.8° 71.6° | 22.4 mp/h |
| Wednesday, May 22 | Unhealthy 153 AQI US | | 77° 69.8° | 22.4 mp/h |
| Thursday, May 23 | Unhealthy for sensitive groups 148 AQI US | | 75.2° 69.8° | 24.6 mp/h |
| Friday, May 24 | Unhealthy for sensitive groups 121 AQI US | | 73.4° 69.8° | 15.7 mp/h |
| Saturday, May 25 | Moderate 92 AQI US  |  | 75.2° 69.8° | 13.4 mp/h |
| Sunday, May 26 | Unhealthy for sensitive groups 112 AQI US | | 75.2° 69.8° | 15.7 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Where is the cleanest air quality in Saint-Louis?
No locations are available.
AQI US, Metric