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  4. Jefferson County

Jefferson County

Missouri

2026-05-12 09:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
3.2
O3
μg/m³
38.6
NO2
μg/m³
28.3
PM10
μg/m³
9
SO2
μg/m³
1.7
Weather
  • ℃
  • ℉
9℃
99%
7 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • O3
  • NO2
  • PM10
  • SO2
Places included
Arnold Township
AQI 18
Central Township
AQI 18
High Ridge Township
AQI 18
Imperial Township
AQI 18
Joachim Township
AQI 18
Meramec
AQI 18
Plattin Township
AQI 46
River View Township
AQI 18
Valle Township
AQI 49
Windsor Township
AQI 18
Data Sources
http://www.airnow.gov/

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