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
6.37 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.11 μg/m³
0
55
155
255
425
605+
24.96 ppb
0
55
71
86
201
201+
1.04 ppb
0
36
76
186
605
1005+
19.91 ppb
0
54
101
361
1250
2050+
0.34 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Herrin, Illinois
Herrin, Illinois
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AQI 44
Good
7.72μg/m³
PM2.5
35.99μg/m³
PM10
35.04ppb
O3
1.32ppb
SO2
18.56ppb
NO2
0.58ppm
CO
AQI 49
Good
8.54μg/m³
PM2.5
21.68μg/m³
PM10
46.02ppb
O3
1.23ppb
SO2
16.02ppb
NO2
0.59ppm
CO
AQI 38
Good
7.37μg/m³
PM2.5
24.80μg/m³
PM10
36.55ppb
O3
1.15ppb
SO2
13.00ppb
NO2
0.54ppm
CO
AQI 52
Moderate
10.02μg/m³
PM2.5
31.23μg/m³
PM10
43.31ppb
O3
1.07ppb
SO2
21.48ppb
NO2
0.59ppm
CO
AQI 52
Moderate
10.22μg/m³
PM2.5
35.71μg/m³
PM10
46.54ppb
O3
1.03ppb
SO2
18.55ppb
NO2
0.60ppm
CO
AQI 38
Good
6.99μg/m³
PM2.5
26.09μg/m³
PM10
32.06ppb
O3
0.76ppb
SO2
8.58ppb
NO2
0.34ppm
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 01:00:00 on 2026-10-07.
In the last 24 hours, the best air quality in Herrin, Illinois was observed at 01:00:00 on 2026-10-06.
As of now, the AQI in Herrin, Illinois is 44, 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 8.441 μg/m3.
The PM10 concentration in Herrin, Illinois is 36.846 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Herrin, Illinois is 0.223 ppm.
Currently, Herrin, Illinois has a sulfur dioxide (SO2) concentration of 0.899 ppb.
The current ozone (O3) level in Herrin, Illinois at the moment is 26.725 ppm.
Nitrogen dioxide (NO2) level in Herrin, Illinois at the moment is 8.225 ppb.
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