Stay updated with real-time air quality in Antioch, 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)
42
Good
Antioch, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.38 μg/m³
0
55
155
255
425
605+
44.98 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
4.46 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Antioch, Illinois
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AQI 42
Good
3.33μg/m³
PM2.5
14.05μg/m³
PM10
44.74ppb
O3
0.33ppb
SO2
4.44ppb
NO2
0.16ppm
CO
AQI 48
Good
4.26μg/m³
PM2.5
14.70μg/m³
PM10
51.64ppb
O3
0.36ppb
SO2
4.46ppb
NO2
0.16ppm
CO
AQI 39
Good
3.13μg/m³
PM2.5
12.28μg/m³
PM10
42.48ppb
O3
0.36ppb
SO2
4.50ppb
NO2
0.15ppm
CO
AQI 40
Good
3.41μg/m³
PM2.5
14.15μg/m³
PM10
42.89ppb
O3
0.37ppb
SO2
4.52ppb
NO2
0.15ppm
CO
AQI 40
Good
3.41μg/m³
PM2.5
14.15μg/m³
PM10
42.89ppb
O3
0.37ppb
SO2
4.52ppb
NO2
0.15ppm
CO
AQI 47
Good
4.34μg/m³
PM2.5
15.05μg/m³
PM10
51.13ppb
O3
0.37ppb
SO2
4.50ppb
NO2
0.16ppm
CO
Air quality data and pollutant measurements for Illinois, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Antioch, Illinois is updated every hour.
The worst air quality in Antioch, Illinois in the last 24 hours was observed at 10:00:00 on 2026-06-11.
In the last 24 hrs, the best air quality in Antioch, Illinois was observed at 03:00:00 on 2026-06-11.
The current air quality in Antioch, Illinois is 42, categorized as Good based on real-time data.
The most common pollutant in Antioch, Illinois is O3.
If the air quality in Antioch, Illinois is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Antioch, Illinois is 3.206 μg/m3.
The current PM10 concentration at Antioch, Illinois is 12.381 μg/m3.
The current carbon monoxide (CO) concentration at Antioch, Illinois is 0.159 ppm.
The current sulfur dioxide (SO2) concentration at Antioch, Illinois is 0.344 ppb.
The current ozone (O3) concentration at Antioch, Illinois is 44.977 ppm.
The current nitrogen dioxide (NO2) concentration at Antioch, Illinois is 4.464 ppb.
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