Air quality in Colorado

Air quality index (AQI) and PM2.5 air pollution in Colorado

LAST UPDATE (local time)

LIVE AQI CITY RANKING

Real-time Colorado
Most polluted city ranking

Tooltip icon
#cityUS AQI
1 Milliken

125

2 Pueblo

113

3 Lafayette

110

4 Windsor

108

5 Severance

107

6 Niwot

102

7 Arvada

99

8 Fort Lupton

99

9 Erie

98

10 Thornton

98

(local time)

SEE WORLD AQI RANKING

Air Quality Data contributor(s)

Station(s) operated by

Contributors

17

IQAir AirVisual logoIQAir AirVisual logoIQAir AirVisual logoIQAir AirVisual logoIQAir AirVisual logoIQAir AirVisual logo

Join the movement!

Get a monitor and contribute air quality data in your city.

Become a contributor
Find out more about contributors and data sources

LIVE AQI CITY RANKING

Real-time Colorado
Cleanest city ranking

Tooltip icon
#cityUS AQI
1 Black Forest

0

2 Buena Vista

0

3 Castle Pines

0

4 Coal Creek

0

5 Colorado City

0

6 Dove Valley

0

7 Elizabeth

0

8 Estes Park

0

9 Fairplay

0

10 Frisco

0

(local time)

SEE WORLD AQI RANKING
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
rectangle shape clicked to open the map in fullscreen
plus icon clicked to zoom the map in
minus icon clicked to zoom the map out

How to best protect from air pollution?

Reduce your air pollution exposure in Colorado

Which is the most polluted city in Colorado?

Connect With IQAir

Sign up for our newsletter