Stay updated with real-time air quality in Sioux City, Iowa 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)
54
Moderate
Sioux City, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.08 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
36.24 μg/m³
0
55
155
255
425
605+
40.65 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
4.99 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Sioux City, Iowa
Sioux City, Iowa
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AQI 54
Moderate
11.42μg/m³
PM2.5
36.24μg/m³
PM10
39.85ppb
O3
0.48ppb
SO2
4.99ppb
NO2
0.25ppm
CO
AQI 49
Good
9.49μg/m³
PM2.5
30.14μg/m³
PM10
39.27ppb
O3
0.44ppb
SO2
5.01ppb
NO2
0.24ppm
CO
AQI 44
Good
7.62μg/m³
PM2.5
34.00μg/m³
PM10
31.03ppb
O3
0.49ppb
SO2
4.99ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.53μg/m³
PM2.5
33.20μg/m³
PM10
35.25ppb
O3
0.47ppb
SO2
4.66ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.66μg/m³
PM2.5
43.00μg/m³
PM10
43.70ppb
O3
0.24ppb
SO2
0.51ppb
NO2
0.18ppm
CO
AQI 52
Moderate
10.25μg/m³
PM2.5
35.69μg/m³
PM10
38.14ppb
O3
0.29ppb
SO2
3.85ppb
NO2
0.22ppm
CO
The air quality data for Iowa, 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 Sioux City, Iowa are available every hour.
Sioux City, Iowa experienced its worst air quality at 07:00:00, 2026-07-23.
The best air quality in Sioux City, Iowa was observed at 06:00:00 on 2026-07-23.
The air quality in Sioux City, Iowa right now is Moderate, with an AQI of 54.
In Sioux City, Iowa, PM2.5 is the most frequently found pollutant.
When air quality in Sioux City, Iowa is compromised, staying indoors and wearing a mask can reduce health risks.
Sioux City, Iowa currently has a PM2.5 concentration of 11.082 μg/m3.
Sioux City, Iowa currently has a PM10 concentration of 36.244 μg/m3.
The current carbon monoxide (CO) level in Sioux City, Iowa is 0.248 ppm.
The current sulfur dioxide (SO2) concentration in Sioux City, Iowa is 0.48 ppb.
Sioux City, Iowa currently has an ozone (O3) concentration of 40.648 ppm.
The current level of nitrogen dioxide (NO2) in Sioux City, Iowa is 4.991 ppb.
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