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)
20
Good
Herrin, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.40 μg/m³
0
55
155
255
425
605+
21.80 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
2.81 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Herrin, Illinois
Herrin, Illinois
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AQI 21
Good
2.81μg/m³
PM2.5
14.92μg/m³
PM10
23.44ppb
O3
0.83ppb
SO2
4.88ppb
NO2
0.15ppm
CO
AQI 21
Good
2.53μg/m³
PM2.5
16.57μg/m³
PM10
23.49ppb
O3
0.81ppb
SO2
4.99ppb
NO2
0.15ppm
CO
AQI 21
Good
3.00μg/m³
PM2.5
13.33μg/m³
PM10
23.46ppb
O3
0.82ppb
SO2
4.74ppb
NO2
0.17ppm
CO
AQI 20
Good
2.80μg/m³
PM2.5
15.71μg/m³
PM10
21.59ppb
O3
0.79ppb
SO2
5.05ppb
NO2
0.15ppm
CO
AQI 20
Good
2.50μg/m³
PM2.5
18.25μg/m³
PM10
21.85ppb
O3
0.77ppb
SO2
4.33ppb
NO2
0.15ppm
CO
AQI 19
Good
2.93μg/m³
PM2.5
13.58μg/m³
PM10
21.29ppb
O3
0.65ppb
SO2
3.40ppb
NO2
0.15ppm
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 10:00:00 on 2025-10-21.
In the last 24 hours, the best air quality in Herrin, Illinois was observed at 09:00:00 on 2025-10-22.
As of now, the AQI in Herrin, Illinois is 20, indicating Good conditions.
Herrin, Illinois air has the highest levels of O3.
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 2.9 μg/m3.
The PM10 concentration in Herrin, Illinois is 13.402 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Herrin, Illinois is 0.161 ppm.
Currently, Herrin, Illinois has a sulfur dioxide (SO2) concentration of 0.6 ppb.
The current ozone (O3) level in Herrin, Illinois at the moment is 21.802 ppm.
Nitrogen dioxide (NO2) level in Herrin, Illinois at the moment is 2.815 ppb.
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