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)
27
Good
Sioux City, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.88 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.38 μg/m³
0
55
155
255
425
605+
21.77 ppb
0
55
71
86
201
201+
0.92 ppb
0
36
76
186
605
1005+
3.58 ppb
0
54
101
361
1250
2050+
0.16 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 27
Good
4.90μg/m³
PM2.5
14.88μg/m³
PM10
22.27ppb
O3
0.91ppb
SO2
3.58ppb
NO2
0.16ppm
CO
AQI 25
Good
3.96μg/m³
PM2.5
10.94μg/m³
PM10
26.88ppb
O3
0.93ppb
SO2
3.17ppb
NO2
0.18ppm
CO
AQI 27
Good
4.64μg/m³
PM2.5
18.34μg/m³
PM10
19.03ppb
O3
0.95ppb
SO2
2.88ppb
NO2
0.18ppm
CO
AQI 22
Good
3.83μg/m³
PM2.5
11.20μg/m³
PM10
23.73ppb
O3
0.97ppb
SO2
2.66ppb
NO2
0.18ppm
CO
AQI 28
Good
3.50μg/m³
PM2.5
15.94μg/m³
PM10
30.11ppb
O3
0.26ppb
SO2
3.24ppb
NO2
0.12ppm
CO
AQI 33
Good
6.07μg/m³
PM2.5
22.27μg/m³
PM10
25.81ppb
O3
0.46ppb
SO2
3.03ppb
NO2
0.17ppm
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 03:00:00, 2026-06-08.
The best air quality in Sioux City, Iowa was observed at 04:00:00 on 2026-06-07.
The air quality in Sioux City, Iowa right now is Good, with an AQI of 27.
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 4.875 μg/m3.
Sioux City, Iowa currently has a PM10 concentration of 15.379 μg/m3.
The current carbon monoxide (CO) level in Sioux City, Iowa is 0.164 ppm.
The current sulfur dioxide (SO2) concentration in Sioux City, Iowa is 0.915 ppb.
Sioux City, Iowa currently has an ozone (O3) concentration of 21.77 ppm.
The current level of nitrogen dioxide (NO2) in Sioux City, Iowa is 3.582 ppb.
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