Toggle navigation
Places
AQI (US)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
English
Français
Deutsch
日本語
한국어
简体中文
繁體中文
North America
United States
Missouri
St. Louis
AQI (US)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
St. Louis
Missouri, United States
2026-05-23 20:00
AQI (US)
Moderate
Pollutants
|
Pollens
PM2.5
μg/m³
11.5
PM10
μg/m³
52
O3
μg/m³
87.9
NO2
μg/m³
11.6
CO
μg/m³
375
SO2
μg/m³
2
Pollen
5.7
Weather
℃
℃
℉
24℃
73%
9 kph
2 of 11
Historical Data
Hourly
Hourly
Daily
AQI (US)
AQI (US)
Pollen
PM2.5
PM10
O3
NO2
CO
SO2
Places included
BLAIR STREET
AQI 62
BROADWAY (South)
AQI 29
Branch Street
AQI 63
Forest Park
AQI 54
Data Sources
http://www.airnow.gov/
Get the App
Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.
iPhone, iPad
Android
Scan QR Code to Download App
iOS
Google Play
Download APK
Cities Nearby
St. Louis
AQI 55
Sauget
AQI 63
East Saint Louis
AQI 63
Brooklyn
AQI 63
Venice
AQI 63
Cahokia
AQI 63
Alorton
AQI 63
Fairmont City
AQI 53
Washington Park
AQI 53
Granite City
AQI 68
Hillsdale
AQI 54
Air Matters © 2026