Stay updated with real-time air quality in Herrin, Illinois 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)
33
Good
Herrin, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.34 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.43 μg/m³
0
55
155
255
425
605+
15.60 ppb
0
55
71
86
201
201+
1.17 ppb
0
36
76
186
605
1005+
27.68 ppb
0
54
101
361
1250
2050+
0.47 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Herrin, Illinois
Herrin, Illinois
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AQI 38
Good
6.63μg/m³
PM2.5
27.26μg/m³
PM10
14.50ppb
O3
1.18ppb
SO2
27.43ppb
NO2
0.47ppm
CO
AQI 44
Good
7.64μg/m³
PM2.5
33.82μg/m³
PM10
16.60ppb
O3
1.01ppb
SO2
10.49ppb
NO2
0.30ppm
CO
AQI 38
Good
6.95μg/m³
PM2.5
26.43μg/m³
PM10
13.88ppb
O3
1.14ppb
SO2
26.32ppb
NO2
0.46ppm
CO
AQI 33
Good
6.13μg/m³
PM2.5
27.62μg/m³
PM10
20.33ppb
O3
0.99ppb
SO2
6.82ppb
NO2
0.23ppm
CO
AQI 33
Good
5.56μg/m³
PM2.5
23.79μg/m³
PM10
21.34ppb
O3
1.02ppb
SO2
7.36ppb
NO2
0.24ppm
CO
AQI 49
Good
8.70μg/m³
PM2.5
33.49μg/m³
PM10
14.51ppb
O3
1.08ppb
SO2
17.92ppb
NO2
0.36ppm
CO
Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Herrin, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Herrin, Illinois was at its worst at 05:00:00 on 2026-01-22.
In the last 24 hours, the best air quality in Herrin, Illinois was observed at 05:00:00 on 2026-01-22.
As of now, the AQI in Herrin, Illinois is 33, indicating Good conditions.
Herrin, Illinois air has the highest levels of PM2.5.
Poor air quality in Herrin, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Herrin, Illinois are currently 6.344 μg/m3.
The PM10 concentration in Herrin, Illinois is 20.433 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Herrin, Illinois is 0.467 ppm.
Currently, Herrin, Illinois has a sulfur dioxide (SO2) concentration of 1.168 ppb.
The current ozone (O3) level in Herrin, Illinois at the moment is 15.602 ppm.
Nitrogen dioxide (NO2) level in Herrin, Illinois at the moment is 27.685 ppb.
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