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)
29
Good
Sioux City, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.33 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.57 μg/m³
0
55
155
255
425
605+
30.99 ppb
0
55
71
86
201
201+
0.76 ppb
0
36
76
186
605
1005+
4.03 ppb
0
54
101
361
1250
2050+
0.24 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 28
Good
3.34μg/m³
PM2.5
12.92μg/m³
PM10
30.39ppb
O3
0.76ppb
SO2
4.03ppb
NO2
0.24ppm
CO
AQI 26
Good
3.17μg/m³
PM2.5
15.17μg/m³
PM10
27.99ppb
O3
0.78ppb
SO2
3.52ppb
NO2
0.27ppm
CO
AQI 24
Good
3.07μg/m³
PM2.5
16.98μg/m³
PM10
26.01ppb
O3
0.83ppb
SO2
3.39ppb
NO2
0.27ppm
CO
AQI 21
Good
3.22μg/m³
PM2.5
20.66μg/m³
PM10
23.18ppb
O3
0.85ppb
SO2
3.63ppb
NO2
0.28ppm
CO
AQI 33
Good
6.22μg/m³
PM2.5
27.97μg/m³
PM10
32.48ppb
O3
0.44ppb
SO2
3.17ppb
NO2
0.15ppm
CO
AQI 25
Good
4.26μg/m³
PM2.5
15.69μg/m³
PM10
27.11ppb
O3
0.57ppb
SO2
3.43ppb
NO2
0.26ppm
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 02:00:00, 2026-09-06.
The best air quality in Sioux City, Iowa was observed at 09:00:00 on 2026-09-07.
The air quality in Sioux City, Iowa right now is Good, with an AQI of 29.
In Sioux City, Iowa, O3 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 3.331 μg/m3.
Sioux City, Iowa currently has a PM10 concentration of 13.568 μg/m3.
The current carbon monoxide (CO) level in Sioux City, Iowa is 0.242 ppm.
The current sulfur dioxide (SO2) concentration in Sioux City, Iowa is 0.761 ppb.
Sioux City, Iowa currently has an ozone (O3) concentration of 30.988 ppm.
The current level of nitrogen dioxide (NO2) in Sioux City, Iowa is 4.031 ppb.
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