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)
34
Good
Centennial, Colorado
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
1.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
3.86 μg/m³
0
55
155
255
425
605+
36.62 ppb
0
55
71
86
201
201+
0.61 ppb
0
36
76
186
605
1005+
8.45 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Centennial, Colorado
Centennial, Colorado
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AQI 37
Good
1.46μg/m³
PM2.5
7.08μg/m³
PM10
39.67ppb
O3
0.56ppb
SO2
6.81ppb
NO2
0.13ppm
CO
AQI 37
Good
1.37μg/m³
PM2.5
6.89μg/m³
PM10
39.66ppb
O3
0.56ppb
SO2
6.80ppb
NO2
0.13ppm
CO
AQI 36
Good
1.32μg/m³
PM2.5
7.30μg/m³
PM10
38.70ppb
O3
0.56ppb
SO2
6.74ppb
NO2
0.13ppm
CO
AQI 40
Good
2.23μg/m³
PM2.5
8.83μg/m³
PM10
42.91ppb
O3
0.59ppb
SO2
6.43ppb
NO2
0.13ppm
CO
AQI 39
Good
1.51μg/m³
PM2.5
6.65μg/m³
PM10
41.93ppb
O3
0.57ppb
SO2
6.58ppb
NO2
0.13ppm
CO
AQI 43
Good
1.37μg/m³
PM2.5
7.95μg/m³
PM10
46.12ppb
O3
0.53ppb
SO2
6.70ppb
NO2
0.13ppm
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 10:00:00 on 2025-07-22.
In the last 24 hrs, the best air quality in Centennial, Colorado was observed at 02:00:00 on 2025-07-22.
The current air quality in Centennial, Colorado is 36, 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 1.471 μg/m3.
The current PM10 concentration at Centennial, Colorado is 4.173 μg/m3.
The current carbon monoxide (CO) concentration at Centennial, Colorado is 0.181 ppm.
The current sulfur dioxide (SO2) concentration at Centennial, Colorado is 0.589 ppb.
The current ozone (O3) concentration at Centennial, Colorado is 38.763 ppm.
The current nitrogen dioxide (NO2) concentration at Centennial, Colorado is 7.371 ppb.
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