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)
41
Good
Lone Tree, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
5.89 μg/m³
0
55
155
255
425
605+
43.88 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
6.04 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Lone Tree, Colorado
Lone Tree, Colorado
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AQI 127
Unhealthy for sensitive groups
45.84μg/m³
PM2.5
205.57μg/m³
PM10
41.69ppb
O3
0.44ppb
SO2
7.32ppb
NO2
0.16ppm
CO
AQI 132
Unhealthy for sensitive groups
47.74μg/m³
PM2.5
214.61μg/m³
PM10
46.13ppb
O3
0.40ppb
SO2
6.63ppb
NO2
0.16ppm
CO
AQI 149
Unhealthy for sensitive groups
54.82μg/m³
PM2.5
248.96μg/m³
PM10
45.02ppb
O3
0.37ppb
SO2
6.18ppb
NO2
0.15ppm
CO
AQI 130
Unhealthy for sensitive groups
47.48μg/m³
PM2.5
213.18μg/m³
PM10
40.56ppb
O3
0.40ppb
SO2
6.68ppb
NO2
0.16ppm
CO
AQI 84
Moderate
26.93μg/m³
PM2.5
117.47μg/m³
PM10
44.31ppb
O3
0.42ppb
SO2
6.99ppb
NO2
0.16ppm
CO
AQI 151
Unhealthy
55.51μg/m³
PM2.5
245.51μg/m³
PM10
41.66ppb
O3
0.36ppb
SO2
6.09ppb
NO2
0.15ppm
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 03:00:00 on 2026-04-24.
In the last 24 hours, the best air quality in Lone Tree, Colorado was observed at 12:00:00 on 2026-04-23.
As of now, the AQI in Lone Tree, Colorado is 42, indicating Good 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 1.151 μg/m3.
The PM10 concentration in Lone Tree, Colorado is 5.198 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lone Tree, Colorado is 0.216 ppm.
Currently, Lone Tree, Colorado has a sulfur dioxide (SO2) concentration of 0.381 ppb.
The current ozone (O3) level in Lone Tree, Colorado at the moment is 44.74 ppm.
Nitrogen dioxide (NO2) level in Lone Tree, Colorado at the moment is 5.742 ppb.
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