1. North America
  2. United States
  3. Missouri
  4. St. Charles County
  6. O'Fallon

O'Fallon

Boone Township, St. Charles County

2026-09-10 21:00
CAQI (Europe)
Low
Pollutants|Pollens
O3
μg/m³
62.3
PM10
μg/m³
10.3
NO2
μg/m³
20.2
PM2.5
μg/m³
3.5
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
26℃
82%
2 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • CAQI (Europe)
  • Pollen
  • O3
  • PM10
  • NO2
  • PM2.5
  • SO2

Get the App

Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.

iPhone, iPad

Android

Cities Nearby

O'Fallon
AQI 26
St. Peters
AQI 2
Saint Paul
AQI 21
Cottleville
AQI 2
Lake Saint Louis
AQI 25
Josephville
AQI 21
Weldon Spring
AQI 28
Weldon Spring Heights
AQI 2
Wentzville
AQI 23
Chain of Rocks
AQI 24
Flint Hill
AQI 23