Stay updated with real-time air quality in Four Square Mile, 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
Four Square Mile, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.45 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.28 μg/m³
0
55
155
255
425
605+
27.93 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
20.00 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Four Square Mile, Colorado
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AQI 20
Good
1.35μg/m³
PM2.5
4.80μg/m³
PM10
20.02ppb
O3
0.71ppb
SO2
21.35ppb
NO2
0.25ppm
CO
AQI 31
Good
2.15μg/m³
PM2.5
8.26μg/m³
PM10
33.09ppb
O3
0.64ppb
SO2
16.98ppb
NO2
0.22ppm
CO
AQI 32
Good
0.81μg/m³
PM2.5
3.63μg/m³
PM10
34.62ppb
O3
0.70ppb
SO2
18.27ppb
NO2
0.23ppm
CO
AQI 30
Good
1.06μg/m³
PM2.5
4.29μg/m³
PM10
32.49ppb
O3
0.75ppb
SO2
16.12ppb
NO2
0.25ppm
CO
AQI 31
Good
0.81μg/m³
PM2.5
3.73μg/m³
PM10
34.13ppb
O3
0.70ppb
SO2
18.97ppb
NO2
0.23ppm
CO
AQI 24
Good
1.44μg/m³
PM2.5
6.06μg/m³
PM10
25.99ppb
O3
0.88ppb
SO2
16.57ppb
NO2
0.28ppm
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 Four Square Mile, Colorado are available every hour.
Four Square Mile, Colorado experienced its worst air quality at 03:00:00, 2026-03-09.
The best air quality in Four Square Mile, Colorado was observed at 10:00:00 on 2026-03-09.
The air quality in Four Square Mile, Colorado right now is Good, with an AQI of 26.
In Four Square Mile, Colorado, O3 is the most frequently found pollutant.
When air quality in Four Square Mile, Colorado is compromised, staying indoors and wearing a mask can reduce health risks.
Four Square Mile, Colorado currently has a PM2.5 concentration of 1.449 μg/m3.
Four Square Mile, Colorado currently has a PM10 concentration of 6.282 μg/m3.
The current carbon monoxide (CO) level in Four Square Mile, Colorado is 0.254 ppm.
The current sulfur dioxide (SO2) concentration in Four Square Mile, Colorado is 0.602 ppb.
Four Square Mile, Colorado currently has an ozone (O3) concentration of 27.933 ppm.
The current level of nitrogen dioxide (NO2) in Four Square Mile, Colorado is 20.002 ppb.
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