Stay updated with real-time air quality in South Sioux City, Nebraska 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)
19
Good
South Sioux City, Nebraska
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.06 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.84 μg/m³
0
55
155
255
425
605+
19.91 ppb
0
55
71
86
201
201+
0.86 ppb
0
36
76
186
605
1005+
5.31 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
South Sioux City, Nebraska
South Sioux City, Nebraska
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AQI 19
Good
3.04μg/m³
PM2.5
8.84μg/m³
PM10
19.94ppb
O3
0.87ppb
SO2
5.31ppb
NO2
0.21ppm
CO
AQI 19
Good
2.93μg/m³
PM2.5
9.07μg/m³
PM10
19.90ppb
O3
0.91ppb
SO2
5.23ppb
NO2
0.21ppm
CO
AQI 19
Good
1.61μg/m³
PM2.5
7.01μg/m³
PM10
20.00ppb
O3
0.63ppb
SO2
5.57ppb
NO2
0.21ppm
CO
AQI 19
Good
2.58μg/m³
PM2.5
9.04μg/m³
PM10
20.92ppb
O3
0.66ppb
SO2
5.50ppb
NO2
0.21ppm
CO
AQI 31
Good
2.72μg/m³
PM2.5
11.04μg/m³
PM10
32.83ppb
O3
0.26ppb
SO2
0.85ppb
NO2
0.13ppm
CO
AQI 21
Good
3.21μg/m³
PM2.5
14.65μg/m³
PM10
23.18ppb
O3
0.76ppb
SO2
3.95ppb
NO2
0.20ppm
CO
Air quality measurements for Nebraska, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for South Sioux City, Nebraska is updated on an hourly basis.
The worst air quality in South Sioux City, Nebraska was recorded at 01:00:00 on 2026-09-13.
The best air quality in South Sioux City, Nebraska was recorded at 06:00:00 on 2026-09-13.
The real-time air quality index in South Sioux City, Nebraska is 19, currently categorized as Good.
The most common pollutant in South Sioux City, Nebraska is O3.
If the air quality in South Sioux City, Nebraska is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in South Sioux City, Nebraska at present are 3.065 μg/m3.
The current PM10 levels in South Sioux City, Nebraska are 8.839 μg/m3.
The current carbon monoxide (CO) level in South Sioux City, Nebraska is 0.211 ppm.
The current sulfur dioxide (SO2) levels in South Sioux City, Nebraska are 0.859 ppb.
The current ozone (O3) levels at South Sioux City, Nebraska is 19.915 ppm.
The current nitrogen dioxide (NO2) levels at South Sioux City, Nebraska is 5.31 ppb.
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