Stay updated with real-time air quality in Thornton, 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)
56
Moderate
Thornton, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.47 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
64.89 μg/m³
0
55
155
255
425
605+
25.64 ppb
0
55
71
86
201
201+
1.17 ppb
0
36
76
186
605
1005+
19.96 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Thornton, Colorado
Thornton, Colorado
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AQI 60
Moderate
7.58μg/m³
PM2.5
73.34μg/m³
PM10
26.78ppb
O3
1.03ppb
SO2
18.33ppb
NO2
0.42ppm
CO
AQI 52
Moderate
7.35μg/m³
PM2.5
56.69μg/m³
PM10
24.54ppb
O3
1.31ppb
SO2
21.38ppb
NO2
0.41ppm
CO
AQI 51
Moderate
7.35μg/m³
PM2.5
55.23μg/m³
PM10
24.38ppb
O3
1.34ppb
SO2
21.70ppb
NO2
0.40ppm
CO
AQI 47
Good
7.35μg/m³
PM2.5
51.43μg/m³
PM10
23.93ppb
O3
1.41ppb
SO2
22.62ppb
NO2
0.39ppm
CO
AQI 41
Good
7.19μg/m³
PM2.5
44.02μg/m³
PM10
22.95ppb
O3
1.54ppb
SO2
23.34ppb
NO2
0.39ppm
CO
AQI 57
Moderate
7.42μg/m³
PM2.5
67.40μg/m³
PM10
26.31ppb
O3
1.12ppb
SO2
19.58ppb
NO2
0.41ppm
CO
Air quality and pollutant data for Colorado, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Thornton, Colorado is updated every hour for accuracy.
In the past 24 hours, the air quality in Thornton, Colorado was at its worst at 05:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Thornton, Colorado was observed at 12:00:00 on 2026-10-22.
As of now, the AQI in Thornton, Colorado is 56, indicating Moderate conditions.
Thornton, Colorado air has the highest levels of PM10.
Poor air quality in Thornton, Colorado means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Thornton, Colorado are currently 7.475 μg/m3.
The PM10 concentration in Thornton, Colorado is 64.886 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Thornton, Colorado is 0.411 ppm.
Currently, Thornton, Colorado has a sulfur dioxide (SO2) concentration of 1.174 ppb.
The current ozone (O3) level in Thornton, Colorado at the moment is 25.645 ppm.
Nitrogen dioxide (NO2) level in Thornton, Colorado at the moment is 19.963 ppb.
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