Stay updated with real-time air quality in Centennial, Colorado featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
46
Good
Centennial, Colorado
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
7.02 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.46 μg/m³
0
55
155
255
425
605+
50.16 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
14.66 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Centennial, Colorado
Centennial, Colorado
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AQI 33
Good
5.56μg/m³
PM2.5
36.26μg/m³
PM10
33.06ppb
O3
0.74ppb
SO2
24.02ppb
NO2
0.56ppm
CO
AQI 31
Good
5.31μg/m³
PM2.5
34.25μg/m³
PM10
33.41ppb
O3
0.73ppb
SO2
23.94ppb
NO2
0.55ppm
CO
AQI 38
Good
5.98μg/m³
PM2.5
40.67μg/m³
PM10
33.88ppb
O3
0.72ppb
SO2
23.75ppb
NO2
0.52ppm
CO
AQI 31
Good
5.44μg/m³
PM2.5
34.02μg/m³
PM10
30.80ppb
O3
0.79ppb
SO2
25.47ppb
NO2
0.61ppm
CO
AQI 30
Good
4.27μg/m³
PM2.5
23.59μg/m³
PM10
32.30ppb
O3
0.77ppb
SO2
24.66ppb
NO2
0.62ppm
CO
AQI 35
Good
4.88μg/m³
PM2.5
28.27μg/m³
PM10
37.77ppb
O3
0.67ppb
SO2
23.07ppb
NO2
0.44ppm
CO
Air quality data and pollutant measurements for Colorado, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Centennial, Colorado is updated every hour.
The worst air quality in Centennial, Colorado in the last 24 hours was observed at 05:00:00 on 2025-07-09.
In the last 24 hrs, the best air quality in Centennial, Colorado was observed at 07:00:00 on 2025-07-09.
The current air quality in Centennial, Colorado is 32, categorized as Good based on real-time data.
The most common pollutant in Centennial, Colorado is O3.
If the air quality in Centennial, Colorado is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Centennial, Colorado is 3.597 μg/m3.
The current PM10 concentration at Centennial, Colorado is 18.365 μg/m3.
The current carbon monoxide (CO) concentration at Centennial, Colorado is 0.445 ppm.
The current sulfur dioxide (SO2) concentration at Centennial, Colorado is 0.858 ppb.
The current ozone (O3) concentration at Centennial, Colorado is 34.731 ppm.
The current nitrogen dioxide (NO2) concentration at Centennial, Colorado is 23.576 ppb.
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