Longmont - Municipal, Colorado, USA Air Quality

Monitoring Station · Longmont, United States
50
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
33 11pm
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33 2am
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Station readings
50
CAMS model adj +8
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Air Quality Forecast (24h)

PM2.512.0 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

29
Longmont Collocation 1
0.0 km PM2.5: 6.9 µg/m³
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united-states-of-america-boulder-joslyn-court
20.3 km PM2.5: 0.0 µg/m³
33
Athens, Boulder-CU, Colorado, USA
22.0 km PM2.5: 7.9 µg/m³
12
Platteville Middle School
24.0 km PM2.5: 3.0 µg/m³
28
Silver Creek
24.9 km PM2.5: 6.7 µg/m³
19
Trail Winds Recreation Center
29.0 km PM2.5: 4.6 µg/m³
20
Anythink Brighton Library
31.0 km PM2.5: 4.9 µg/m³

Nearby Cities

29 Longmont 22 Erie 22 Louisville 2 Boulder 25 Loveland 25 Broomfield 22 Northglenn 20 Thornton 22 Sherrelwood

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T02:24 UTC.