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)
64
Moderate
Thornton, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
37.45 μg/m³
0
55
155
255
425
605+
59.46 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
11.89 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 67
Moderate
7.60μg/m³
PM2.5
38.75μg/m³
PM10
59.91ppb
O3
0.32ppb
SO2
11.99ppb
NO2
0.20ppm
CO
AQI 64
Moderate
7.63μg/m³
PM2.5
36.21μg/m³
PM10
59.05ppb
O3
0.56ppb
SO2
11.72ppb
NO2
0.20ppm
CO
AQI 64
Moderate
7.62μg/m³
PM2.5
35.91μg/m³
PM10
58.93ppb
O3
0.57ppb
SO2
11.71ppb
NO2
0.20ppm
CO
AQI 64
Moderate
7.61μg/m³
PM2.5
35.22μg/m³
PM10
58.65ppb
O3
0.62ppb
SO2
11.71ppb
NO2
0.20ppm
CO
AQI 61
Moderate
7.62μg/m³
PM2.5
33.96μg/m³
PM10
58.29ppb
O3
0.72ppb
SO2
11.27ppb
NO2
0.20ppm
CO
AQI 64
Moderate
7.62μg/m³
PM2.5
37.64μg/m³
PM10
59.28ppb
O3
0.39ppb
SO2
12.04ppb
NO2
0.20ppm
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 2026-07-22.
In the last 24 hours, the best air quality in Thornton, Colorado was observed at 12:00:00 on 2026-07-23.
As of now, the AQI in Thornton, Colorado is 64, indicating Moderate conditions.
Thornton, Colorado air has the highest levels of O3.
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 7.613 μg/m3.
The PM10 concentration in Thornton, Colorado is 37.455 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Thornton, Colorado is 0.197 ppm.
Currently, Thornton, Colorado has a sulfur dioxide (SO2) concentration of 0.441 ppb.
The current ozone (O3) level in Thornton, Colorado at the moment is 59.462 ppm.
Nitrogen dioxide (NO2) level in Thornton, Colorado at the moment is 11.894 ppb.
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