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)
33
Good
Thornton, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.41 μg/m³
0
55
155
255
425
605+
16.74 ppb
0
55
71
86
201
201+
0.32 ppb
0
36
76
186
605
1005+
11.06 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Thornton, Colorado
Thornton, Colorado
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AQI 33
Good
6.38μg/m³
PM2.5
26.93μg/m³
PM10
20.12ppb
O3
0.22ppb
SO2
11.42ppb
NO2
0.19ppm
CO
AQI 33
Good
6.13μg/m³
PM2.5
26.17μg/m³
PM10
21.32ppb
O3
0.40ppb
SO2
12.28ppb
NO2
0.20ppm
CO
AQI 33
Good
6.10μg/m³
PM2.5
26.10μg/m³
PM10
21.37ppb
O3
0.41ppb
SO2
12.51ppb
NO2
0.20ppm
CO
AQI 33
Good
6.05μg/m³
PM2.5
25.92μg/m³
PM10
21.54ppb
O3
0.46ppb
SO2
13.17ppb
NO2
0.20ppm
CO
AQI 33
Good
5.93μg/m³
PM2.5
25.59μg/m³
PM10
22.07ppb
O3
0.54ppb
SO2
12.61ppb
NO2
0.20ppm
CO
AQI 33
Good
6.28μg/m³
PM2.5
26.62μg/m³
PM10
20.47ppb
O3
0.27ppb
SO2
12.08ppb
NO2
0.19ppm
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 10:00:00 on 2026-09-06.
In the last 24 hours, the best air quality in Thornton, Colorado was observed at 11:00:00 on 2026-09-06.
As of now, the AQI in Thornton, Colorado is 33, indicating Good conditions.
Thornton, Colorado air has the highest levels of PM2.5.
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 6.375 μg/m3.
The PM10 concentration in Thornton, Colorado is 26.41 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Thornton, Colorado is 0.198 ppm.
Currently, Thornton, Colorado has a sulfur dioxide (SO2) concentration of 0.32 ppb.
The current ozone (O3) level in Thornton, Colorado at the moment is 16.738 ppm.
Nitrogen dioxide (NO2) level in Thornton, Colorado at the moment is 11.065 ppb.
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