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  4. Boulder County
  5. Boulder

Boulder

Boulder County, Colorado

2026-04-21 20:00
CAQI (Europe)
Low
Pollutants|Pollens
O3
μg/m³
87.9
PM10
μg/m³
33
PM2.5
μg/m³
4.6
Weather
  • ℃
  • ℉
28℃
13%
19 kph
6 of 11
Historical Data
  • Hourly
  • Daily
  • CAQI (Europe)
  • Pollen
  • O3
  • PM10
  • PM2.5
Places included
Boulder - CU - 2102 Athens St.
AQI 33
Boulder Reservoir
AQI 37
Data Sources
http://www.airnow.gov/

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Cities Nearby

Boulder
AQI 37
Eldorado Springs
AQI 33
Gunbarrel
AQI 33
Superior
AQI 33
Louisville
AQI 64
Niwot
AQI 33
Coal Creek
AQI 33
Lafayette
AQI 33
Broomfield
AQI 24
Erie
AQI 33
Ward
AQI 33