Stay updated with real-time air quality in Littleton, 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)
49
Good
Littleton, Colorado
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.83 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.71 μg/m³
0
55
155
255
425
605+
53.33 ppb
0
55
71
86
201
201+
0.65 ppb
0
36
76
186
605
1005+
10.10 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Littleton, Colorado
Littleton, Colorado
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AQI 43
Good
3.88μg/m³
PM2.5
14.64μg/m³
PM10
46.14ppb
O3
0.79ppb
SO2
10.28ppb
NO2
0.19ppm
CO
AQI 44
Good
3.33μg/m³
PM2.5
12.15μg/m³
PM10
47.41ppb
O3
0.87ppb
SO2
10.71ppb
NO2
0.18ppm
CO
AQI 44
Good
5.00μg/m³
PM2.5
17.33μg/m³
PM10
46.85ppb
O3
0.85ppb
SO2
11.17ppb
NO2
0.18ppm
CO
AQI 44
Good
5.62μg/m³
PM2.5
19.16μg/m³
PM10
46.96ppb
O3
0.86ppb
SO2
11.42ppb
NO2
0.18ppm
CO
AQI 44
Good
2.98μg/m³
PM2.5
11.05μg/m³
PM10
48.14ppb
O3
0.87ppb
SO2
10.52ppb
NO2
0.18ppm
CO
AQI 44
Good
2.36μg/m³
PM2.5
9.29μg/m³
PM10
48.33ppb
O3
0.87ppb
SO2
10.46ppb
NO2
0.18ppm
CO
The air quality data for Colorado, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Littleton, Colorado are available every hour.
Littleton, Colorado experienced its worst air quality at 08:00:00, 2025-07-19.
The best air quality in Littleton, Colorado was observed at 12:00:00 on 2025-07-20.
The air quality in Littleton, Colorado right now is Good, with an AQI of 48.
In Littleton, Colorado, O3 is the most frequently found pollutant.
When air quality in Littleton, Colorado is compromised, staying indoors and wearing a mask can reduce health risks.
Littleton, Colorado currently has a PM2.5 concentration of 2.58 μg/m3.
Littleton, Colorado currently has a PM10 concentration of 10.646 μg/m3.
The current carbon monoxide (CO) level in Littleton, Colorado is 0.1 ppm.
The current sulfur dioxide (SO2) concentration in Littleton, Colorado is 0.82 ppb.
Littleton, Colorado currently has an ozone (O3) concentration of 52.3 ppm.
The current level of nitrogen dioxide (NO2) in Littleton, Colorado is 5.086 ppb.
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