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)
38
Good
Herrin, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.41 μg/m³
0
55
155
255
425
605+
40.81 ppb
0
55
71
86
201
201+
3.21 ppb
0
36
76
186
605
1005+
5.95 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Herrin, Illinois
Herrin, Illinois
Scroll To Air Quality MapLoading...
AQI 39
Good
6.21μg/m³
PM2.5
29.86μg/m³
PM10
42.42ppb
O3
3.35ppb
SO2
5.55ppb
NO2
0.30ppm
CO
AQI 39
Good
6.59μg/m³
PM2.5
31.97μg/m³
PM10
41.70ppb
O3
3.37ppb
SO2
5.95ppb
NO2
0.32ppm
CO
AQI 38
Good
6.68μg/m³
PM2.5
29.12μg/m³
PM10
39.85ppb
O3
3.05ppb
SO2
5.33ppb
NO2
0.31ppm
CO
AQI 39
Good
6.56μg/m³
PM2.5
29.82μg/m³
PM10
42.47ppb
O3
3.29ppb
SO2
5.60ppb
NO2
0.33ppm
CO
AQI 35
Good
6.23μg/m³
PM2.5
29.25μg/m³
PM10
38.41ppb
O3
3.28ppb
SO2
5.58ppb
NO2
0.33ppm
CO
AQI 45
Good
7.04μg/m³
PM2.5
30.00μg/m³
PM10
48.58ppb
O3
1.71ppb
SO2
2.43ppb
NO2
0.22ppm
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 06:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Herrin, Illinois was observed at 04:00:00 on 2026-10-22.
As of now, the AQI in Herrin, Illinois is 38, 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 6.215 μg/m3.
The PM10 concentration in Herrin, Illinois is 26.406 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Herrin, Illinois is 0.311 ppm.
Currently, Herrin, Illinois has a sulfur dioxide (SO2) concentration of 3.213 ppb.
The current ozone (O3) level in Herrin, Illinois at the moment is 40.811 ppm.
Nitrogen dioxide (NO2) level in Herrin, Illinois at the moment is 5.947 ppb.
All Rights Reserved © Ambee Inc. 2025