Stay updated with real-time air quality in Lone Tree, 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)
77
Moderate
Lone Tree, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.54 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.78 μg/m³
0
55
155
255
425
605+
63.03 ppb
0
55
71
86
201
201+
0.93 ppb
0
36
76
186
605
1005+
12.52 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Lone Tree, Colorado
Lone Tree, Colorado
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AQI 77
Moderate
7.53μg/m³
PM2.5
32.02μg/m³
PM10
63.20ppb
O3
0.92ppb
SO2
12.50ppb
NO2
0.19ppm
CO
AQI 77
Moderate
7.49μg/m³
PM2.5
31.19μg/m³
PM10
63.09ppb
O3
0.93ppb
SO2
12.52ppb
NO2
0.19ppm
CO
AQI 84
Moderate
7.36μg/m³
PM2.5
31.88μg/m³
PM10
64.55ppb
O3
0.88ppb
SO2
12.31ppb
NO2
0.19ppm
CO
AQI 77
Moderate
7.54μg/m³
PM2.5
32.18μg/m³
PM10
63.29ppb
O3
0.93ppb
SO2
12.52ppb
NO2
0.19ppm
CO
AQI 61
Moderate
8.13μg/m³
PM2.5
33.85μg/m³
PM10
57.90ppb
O3
0.82ppb
SO2
11.74ppb
NO2
0.19ppm
CO
AQI 77
Moderate
7.50μg/m³
PM2.5
31.00μg/m³
PM10
63.02ppb
O3
0.94ppb
SO2
12.62ppb
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 Lone Tree, Colorado is updated every hour for accuracy.
In the past 24 hours, the air quality in Lone Tree, Colorado was at its worst at 09:00:00 on 2026-07-22.
In the last 24 hours, the best air quality in Lone Tree, Colorado was observed at 01:00:00 on 2026-07-23.
As of now, the AQI in Lone Tree, Colorado is 77, indicating Moderate conditions.
Lone Tree, Colorado air has the highest levels of O3.
Poor air quality in Lone Tree, Colorado means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Lone Tree, Colorado are currently 7.537 μg/m3.
The PM10 concentration in Lone Tree, Colorado is 31.779 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lone Tree, Colorado is 0.194 ppm.
Currently, Lone Tree, Colorado has a sulfur dioxide (SO2) concentration of 0.93 ppb.
The current ozone (O3) level in Lone Tree, Colorado at the moment is 63.033 ppm.
Nitrogen dioxide (NO2) level in Lone Tree, Colorado at the moment is 12.523 ppb.
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