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)
27
Good
Centennial, Colorado
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.33 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.98 μg/m³
0
55
155
255
425
605+
29.36 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
13.60 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Centennial, Colorado
Centennial, Colorado
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AQI 29
Good
3.58μg/m³
PM2.5
10.93μg/m³
PM10
30.82ppb
O3
0.42ppb
SO2
16.29ppb
NO2
0.32ppm
CO
AQI 28
Good
3.58μg/m³
PM2.5
11.53μg/m³
PM10
30.38ppb
O3
0.43ppb
SO2
16.37ppb
NO2
0.32ppm
CO
AQI 28
Good
3.53μg/m³
PM2.5
10.61μg/m³
PM10
30.49ppb
O3
0.43ppb
SO2
17.38ppb
NO2
0.32ppm
CO
AQI 33
Good
6.02μg/m³
PM2.5
20.65μg/m³
PM10
30.10ppb
O3
0.41ppb
SO2
15.97ppb
NO2
0.35ppm
CO
AQI 28
Good
4.23μg/m³
PM2.5
16.44μg/m³
PM10
29.81ppb
O3
0.40ppb
SO2
15.17ppb
NO2
0.34ppm
CO
AQI 33
Good
4.70μg/m³
PM2.5
14.52μg/m³
PM10
36.21ppb
O3
0.44ppb
SO2
11.52ppb
NO2
0.29ppm
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 07:00:00 on 2025-06-05.
In the last 24 hrs, the best air quality in Centennial, Colorado was observed at 08:00:00 on 2025-06-05.
The current air quality in Centennial, Colorado is 27, 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 4.328 μg/m3.
The current PM10 concentration at Centennial, Colorado is 11.982 μg/m3.
The current carbon monoxide (CO) concentration at Centennial, Colorado is 0.266 ppm.
The current sulfur dioxide (SO2) concentration at Centennial, Colorado is 0.472 ppb.
The current ozone (O3) concentration at Centennial, Colorado is 29.362 ppm.
The current nitrogen dioxide (NO2) concentration at Centennial, Colorado is 13.602 ppb.
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