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)
49
Good
Herrin, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
36.86 μg/m³
0
55
155
255
425
605+
49.73 ppb
0
55
71
86
201
201+
1.64 ppb
0
36
76
186
605
1005+
11.39 ppb
0
54
101
361
1250
2050+
0.24 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 49
Good
9.25μg/m³
PM2.5
35.30μg/m³
PM10
46.67ppb
O3
1.68ppb
SO2
11.65ppb
NO2
0.24ppm
CO
AQI 49
Good
8.86μg/m³
PM2.5
29.84μg/m³
PM10
46.51ppb
O3
0.58ppb
SO2
11.13ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.79μg/m³
PM2.5
39.49μg/m³
PM10
49.22ppb
O3
1.67ppb
SO2
11.38ppb
NO2
0.23ppm
CO
AQI 49
Good
9.47μg/m³
PM2.5
42.49μg/m³
PM10
47.81ppb
O3
0.57ppb
SO2
10.96ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.51μg/m³
PM2.5
43.62μg/m³
PM10
46.89ppb
O3
0.58ppb
SO2
6.68ppb
NO2
0.24ppm
CO
AQI 44
Good
8.32μg/m³
PM2.5
37.65μg/m³
PM10
45.00ppb
O3
0.43ppb
SO2
3.60ppb
NO2
0.18ppm
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 2026-04-23.
In the last 24 hours, the best air quality in Herrin, Illinois was observed at 09:00:00 on 2026-04-23.
As of now, the AQI in Herrin, Illinois is 49, 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 9.001 μg/m3.
The PM10 concentration in Herrin, Illinois is 36.86 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Herrin, Illinois is 0.241 ppm.
Currently, Herrin, Illinois has a sulfur dioxide (SO2) concentration of 1.64 ppb.
The current ozone (O3) level in Herrin, Illinois at the moment is 49.73 ppm.
Nitrogen dioxide (NO2) level in Herrin, Illinois at the moment is 11.394 ppb.
All Rights Reserved © Ambee Inc. 2025