Longmont Collocation 1

Monitoring Station · Longmont, United States
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
21 7pm
22
23
23 10pm
36
36
48 1am
48
61
61 4am
61
61
61 7am
48
—
— 10am
—
—
— 1pm
—
—
— 4pm
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Station readings
21
22
CAMS model adj +11
12
12
12
12
25
25
37
37
50
50
50
50
50
37

Air Quality Trend (24h)

PM2.55.2 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

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united-states-of-america-boulder-joslyn-court
20.3 km PM2.5: 0.0 µg/m³
73
Athens, Boulder-CU, Colorado, USA
22.0 km
12
Platteville Middle School
24.1 km PM2.5: 3.0 µg/m³
24
Silver Creek
25.0 km PM2.5: 5.8 µg/m³
21
Trail Winds Recreation Center
29.1 km PM2.5: 5.0 µg/m³
20
Anythink Brighton Library
31.1 km PM2.5: 4.8 µg/m³

Nearby Cities

17 Longmont 21 Erie 21 Louisville 21 Boulder 22 Loveland 22 Broomfield 21 Northglenn 21 Thornton 21 Sherrelwood

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T22:16 UTC.