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)
52
Moderate
Thornton, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.78 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
56.85 μg/m³
0
55
155
255
425
605+
24.11 ppb
0
55
71
86
201
201+
1.08 ppb
0
36
76
186
605
1005+
18.27 ppb
0
54
101
361
1250
2050+
0.50 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Thornton, Colorado
Thornton, Colorado
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AQI 55
Moderate
6.63μg/m³
PM2.5
62.83μg/m³
PM10
25.69ppb
O3
1.01ppb
SO2
15.12ppb
NO2
0.51ppm
CO
AQI 47
Good
6.91μg/m³
PM2.5
51.05μg/m³
PM10
22.59ppb
O3
1.15ppb
SO2
21.19ppb
NO2
0.50ppm
CO
AQI 46
Good
6.95μg/m³
PM2.5
50.00μg/m³
PM10
22.31ppb
O3
1.16ppb
SO2
21.76ppb
NO2
0.50ppm
CO
AQI 44
Good
7.06μg/m³
PM2.5
47.29μg/m³
PM10
21.58ppb
O3
1.17ppb
SO2
23.30ppb
NO2
0.49ppm
CO
AQI 39
Good
7.11μg/m³
PM2.5
41.99μg/m³
PM10
20.24ppb
O3
1.23ppb
SO2
25.52ppb
NO2
0.49ppm
CO
AQI 53
Moderate
6.70μg/m³
PM2.5
58.73μg/m³
PM10
24.90ppb
O3
1.04ppb
SO2
17.25ppb
NO2
0.50ppm
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 52, 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 6.784 μg/m3.
The PM10 concentration in Thornton, Colorado is 56.853 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Thornton, Colorado is 0.504 ppm.
Currently, Thornton, Colorado has a sulfur dioxide (SO2) concentration of 1.082 ppb.
The current ozone (O3) level in Thornton, Colorado at the moment is 24.107 ppm.
Nitrogen dioxide (NO2) level in Thornton, Colorado at the moment is 18.265 ppb.
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