Longmont Collocation 1

Monitoring Station · Longmont, United States
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
22 8pm
19
22
35 11pm
35
47
47 2am
60
60
60 5am
60
60
47 8am
47
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— 11am
—
—
— 2pm
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— 5pm
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Station readings
22
19
CAMS model adj +10
12
12
12
25
25
37
37
50
50
50
50
50
37
37

Air Quality Trend (24h)

PM2.54.6 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

500
united-states-of-america-boulder-joslyn-court
20.3 km PM2.5: 3312.8 µg/m³
12
Platteville Middle School
24.1 km PM2.5: 3.0 µg/m³
23
Silver Creek
25.0 km PM2.5: 5.4 µg/m³
19
Trail Winds Recreation Center
29.1 km PM2.5: 4.5 µg/m³
19
Anythink Brighton Library
31.1 km PM2.5: 4.5 µg/m³

Nearby Cities

16 Longmont 19 Erie 20 Louisville 20 Boulder 19 Loveland 20 Broomfield 20 Northglenn 20 Thornton 20 Sherrelwood

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T23:12 UTC.