Longmont Collocation 1 Air Quality

Monitoring Station · Longmont, United States
61
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
61 4am
66
66
66 7am
66
59
59 10am
59
59
59 1pm
59
59
59 4pm
59
59
— 7pm
—
—
— 10pm
—
—
— 1am
—
—
CAMS model adj +32
34
34
34
34
34
27
27
27
27
27
27
27
27
27
27

Air Quality Forecast (24h)

PM2.516.7 µg/m³ ×1.1 WHO
Moderate
View city history →

Nearby Monitoring Stations

63
Platteville Middle School
24.1 km PM2.5: 18.0 µg/m³
86
Silver Creek
25.0 km PM2.5: 28.9 µg/m³
75
Trail Winds Recreation Center
29.1 km PM2.5: 23.6 µg/m³
61
Anythink Brighton Library
31.1 km PM2.5: 17.0 µg/m³

Nearby Cities

42 Longmont 31 Erie 31 Louisville 31 Boulder 42 Loveland 51 Broomfield 51 Northglenn 51 Thornton 51 Sherrelwood

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-08T07:22 UTC.