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)
26
Good
Thornton, Colorado
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.98 μg/m³
0
55
155
255
425
605+
27.49 ppb
0
55
71
86
201
201+
0.41 ppb
0
36
76
186
605
1005+
11.57 ppb
0
54
101
361
1250
2050+
0.38 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Thornton, Colorado
Thornton, Colorado
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AQI 27
Good
3.54μg/m³
PM2.5
28.80μg/m³
PM10
26.68ppb
O3
0.40ppb
SO2
10.85ppb
NO2
0.27ppm
CO
AQI 25
Good
3.95μg/m³
PM2.5
26.92μg/m³
PM10
23.41ppb
O3
0.40ppb
SO2
18.05ppb
NO2
0.26ppm
CO
AQI 25
Good
3.98μg/m³
PM2.5
26.79μg/m³
PM10
23.19ppb
O3
0.40ppb
SO2
18.59ppb
NO2
0.26ppm
CO
AQI 24
Good
4.09μg/m³
PM2.5
26.38μg/m³
PM10
22.57ppb
O3
0.40ppb
SO2
20.17ppb
NO2
0.25ppm
CO
AQI 24
Good
4.20μg/m³
PM2.5
25.74μg/m³
PM10
21.14ppb
O3
0.40ppb
SO2
22.65ppb
NO2
0.25ppm
CO
AQI 27
Good
3.71μg/m³
PM2.5
29.20μg/m³
PM10
25.89ppb
O3
0.40ppb
SO2
12.75ppb
NO2
0.27ppm
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 01:00:00 on 2025-10-22.
In the last 24 hours, the best air quality in Thornton, Colorado was observed at 12:00:00 on 2025-10-21.
As of now, the AQI in Thornton, Colorado is 26, indicating Good 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 3.899 μg/m3.
The PM10 concentration in Thornton, Colorado is 27.984 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Thornton, Colorado is 0.377 ppm.
Currently, Thornton, Colorado has a sulfur dioxide (SO2) concentration of 0.408 ppb.
The current ozone (O3) level in Thornton, Colorado at the moment is 27.494 ppm.
Nitrogen dioxide (NO2) level in Thornton, Colorado at the moment is 11.571 ppb.
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