AddAir quality in St. Louis County
Air quality index (AQI⁺) and PM2.5 air pollution in St. Louis County • 12:00, May 23 Local time
38
US AQI⁺Good
Main pollutant:
PM2.5
7 µg/m³
22°
7 km/h
75 %
Hourly forecast
St. Louis County air quality index (AQI⁺) forecast
Daily forecast
St. Louis County air quality index (AQI⁺) forecast
| Today | 44 |  | 24° 17° |  9 km/h | 80% |
| Sun | 58 | | 27° 19° | 8 km/h | 76% |
| Mon | 42 | | 27° 20° | 12 km/h | 74% |
Air pollutants
What is the current air quality in St. Louis County?
PM2.5 concentration is currently 1.4 times the World Health Organization annual PM2.5 guideline value.
Health recommendations
 Enjoy outdoor activities |
 Open your windows to bring clean, fresh air indoors Get a monitor |
Protect yourself from air pollution in St. Louis County
Monitor the air you breathe
Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.
Medical grade air purifiers
Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.
Powerful, stylish air purifiers
Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.
Pollen
What is the pollen count in St. Louis County today?
Index
Low
 Tree Low | 25% |
 Grass Low | 25% |
 Weed None | 0% |
Source:
wetter.comHealth recommendations
Enjoy outdoor activities |
Open your windows to bring clean, fresh air indoors Get a monitor |
Pollen
What is the pollen count in St. Louis County today?
Index
Low
Tree Low | 25% |
Grass Low | 25% |
Weed None | 0% |
Source:
wetter.comProtect yourself from air pollution in St. Louis County
Monitor the air you breathe
Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.
Medical grade air purifiers
Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.
Powerful, stylish air purifiers
Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.
Most polluted locations near St. Louis County
Worldwide AQI⁺ ranking
Station ranking
Real-time AQI⁺ station ranking for stations in St. Louis County
City ranking
Real-time USA AQI⁺ city ranking
Historic air quality near St. Louis County
History
Historic air quality graph for St. Louis County
Historic air quality near St. Louis County
History
Historic air quality graph for St. Louis County
Most polluted locations near St. Louis County
Worldwide AQI⁺ rankingStation ranking
Real-time AQI⁺ station ranking for stations in St. Louis County
City ranking
Real-time USA AQI⁺ city ranking
Measure your own air quality
Get a monitor and contribute air quality data in your city.
