Toggle navigation
Places
AQI (China)
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. Charles County
Rivers Township
West Alton
WEST ALTON
AQI (China)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
WEST ALTON
West Alton, St. Charles County
2026-09-20 21:00
AQI (China)
Insufficient Data
--
Pollutants
|
Pollens
O3
μg/m³
158.6
NO2
μg/m³
6
Pollen
8.1
Weather
℃
℃
℉
33℃
51%
11 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
AQI (China)
AQI (China)
Pollen
O3
NO2
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
West Alton
AQI 50
Alton
AQI 43
Old Jamestown
AQI 23
Spanish Lake
AQI 23
Black Jack
AQI 23
Godfrey
AQI 23
East Alton
AQI 23
Wood River
AQI 46
Portage Des Sioux
AQI 18
Hartford
AQI 23
Florissant
AQI 23
Air Matters © 2026