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
5.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.76 μg/m³
0
55
155
255
425
605+
13.95 ppb
0
55
71
86
201
201+
0.54 ppb
0
36
76
186
605
1005+
1.85 ppb
0
54
101
361
1250
2050+
0.17 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
5.31μg/m³
PM2.5
13.77μg/m³
PM10
13.09ppb
O3
0.54ppb
SO2
1.85ppb
NO2
0.17ppm
CO
AQI 16
Good
1.34μg/m³
PM2.5
4.85μg/m³
PM10
16.91ppb
O3
0.28ppb
SO2
1.02ppb
NO2
0.14ppm
CO
AQI 49
Good
9.48μg/m³
PM2.5
42.90μg/m³
PM10
28.28ppb
O3
0.56ppb
SO2
1.86ppb
NO2
0.17ppm
CO
AQI 33
Good
6.46μg/m³
PM2.5
16.18μg/m³
PM10
20.32ppb
O3
0.62ppb
SO2
2.00ppb
NO2
0.17ppm
CO
AQI 22
Good
1.61μg/m³
PM2.5
6.97μg/m³
PM10
23.97ppb
O3
0.28ppb
SO2
0.74ppb
NO2
0.13ppm
CO
AQI 23
Good
3.80μg/m³
PM2.5
22.78μg/m³
PM10
25.21ppb
O3
0.38ppb
SO2
1.77ppb
NO2
0.16ppm
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 11:00:00, 2026-01-22.
The best air quality in Sioux City, Iowa was observed at 02:00:00 on 2026-01-22.
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 5.375 μg/m3.
Sioux City, Iowa currently has a PM10 concentration of 13.763 μg/m3.
The current carbon monoxide (CO) level in Sioux City, Iowa is 0.166 ppm.
The current sulfur dioxide (SO2) concentration in Sioux City, Iowa is 0.541 ppb.
Sioux City, Iowa currently has an ozone (O3) concentration of 13.946 ppm.
The current level of nitrogen dioxide (NO2) in Sioux City, Iowa is 1.852 ppb.
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