Athens, Boulder-CU, Colorado, USA Air Quality

Monitoring Station · Boulder, United States
34
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
46 9pm
34
38
38 12am
38
38
40 3am
40
40
40 6am
40
40
38 9am
38
38
— 12pm
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— 3pm
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— 6pm
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Station readings
46
34
CAMS model adj +13
25
25
25
25
25
25
27
27
27
27
27
27
25
25
25

Air Quality Trend (24h)

PM2.58.2 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

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united-states-of-america-boulder-joslyn-court
2.8 km
25
Longmont Collocation 1
22.0 km PM2.5: 6.1 µg/m³
57
Longmont - Municipal, Colorado, USA
22.0 km PM2.5: 15.0 µg/m³
26
Fremont Elementary School
25.0 km PM2.5: 6.2 µg/m³
28
Westminster Town Hall
25.1 km PM2.5: 6.6 µg/m³
26
Northwest Open Space
25.4 km PM2.5: 6.3 µg/m³
23
North Mor Elementary School
28.4 km PM2.5: 5.6 µg/m³
18
North Star
29.2 km PM2.5: 4.4 µg/m³

Nearby Cities

46 Boulder 35 Louisville 46 Broomfield 46 Erie 46 Longmont 36 Northglenn 53 Arvada 55 Golden 36 Sherrelwood

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-05-29T00:19 UTC.