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)
37
Good
Four Square Mile, Colorado
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.86 μg/m³
0
55
155
255
425
605+
39.80 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
9.73 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Four Square Mile, Colorado
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AQI 34
Good
2.26μg/m³
PM2.5
37.12μg/m³
PM10
37.49ppb
O3
0.43ppb
SO2
10.21ppb
NO2
0.21ppm
CO
AQI 36
Good
2.10μg/m³
PM2.5
22.54μg/m³
PM10
38.50ppb
O3
0.43ppb
SO2
9.79ppb
NO2
0.19ppm
CO
AQI 36
Good
1.55μg/m³
PM2.5
10.34μg/m³
PM10
38.91ppb
O3
0.43ppb
SO2
10.60ppb
NO2
0.20ppm
CO
AQI 36
Good
1.50μg/m³
PM2.5
10.68μg/m³
PM10
39.18ppb
O3
0.42ppb
SO2
10.42ppb
NO2
0.23ppm
CO
AQI 36
Good
1.61μg/m³
PM2.5
11.39μg/m³
PM10
38.63ppb
O3
0.43ppb
SO2
10.61ppb
NO2
0.20ppm
CO
AQI 34
Good
1.51μg/m³
PM2.5
8.58μg/m³
PM10
36.82ppb
O3
0.41ppb
SO2
7.33ppb
NO2
0.27ppm
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 05:00:00 on 2026-03-09.
The air quality in Four Square Mile, Colorado right now is Good, with an AQI of 37.
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 1.647 μg/m3.
Four Square Mile, Colorado currently has a PM10 concentration of 16.86 μg/m3.
The current carbon monoxide (CO) level in Four Square Mile, Colorado is 0.276 ppm.
The current sulfur dioxide (SO2) concentration in Four Square Mile, Colorado is 0.483 ppb.
Four Square Mile, Colorado currently has an ozone (O3) concentration of 39.796 ppm.
The current level of nitrogen dioxide (NO2) in Four Square Mile, Colorado is 9.735 ppb.
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