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

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
42.37 μg/m³
0
55
155
255
425
605+
42.75 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
5.18 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Joliet, Illinois
Joliet, Illinois
Scroll To Air Quality MapLoading...
AQI 36
Good
5.26μg/m³
PM2.5
23.00μg/m³
PM10
38.53ppb
O3
0.76ppb
SO2
4.12ppb
NO2
0.17ppm
CO
AQI 36
Good
5.56μg/m³
PM2.5
23.87μg/m³
PM10
38.59ppb
O3
0.80ppb
SO2
4.28ppb
NO2
0.17ppm
CO
AQI 34
Good
5.44μg/m³
PM2.5
23.08μg/m³
PM10
37.09ppb
O3
0.80ppb
SO2
4.11ppb
NO2
0.17ppm
CO
AQI 37
Good
5.60μg/m³
PM2.5
23.78μg/m³
PM10
39.77ppb
O3
0.57ppb
SO2
3.38ppb
NO2
0.17ppm
CO
AQI 36
Good
5.76μg/m³
PM2.5
24.57μg/m³
PM10
38.91ppb
O3
0.81ppb
SO2
4.37ppb
NO2
0.17ppm
CO
AQI 35
Good
5.53μg/m³
PM2.5
23.51μg/m³
PM10
37.77ppb
O3
0.73ppb
SO2
3.50ppb
NO2
0.17ppm
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 Joliet, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Joliet, Illinois was at its worst at 11:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Joliet, Illinois was observed at 06:00:00 on 2026-04-23.
As of now, the AQI in Joliet, Illinois is 49, indicating Good conditions.
Joliet, Illinois air has the highest levels of PM2.5.
Poor air quality in Joliet, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Joliet, Illinois are currently 9.404 μg/m3.
The PM10 concentration in Joliet, Illinois is 42.37 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Joliet, Illinois is 0.128 ppm.
Currently, Joliet, Illinois has a sulfur dioxide (SO2) concentration of 0.6 ppb.
The current ozone (O3) level in Joliet, Illinois at the moment is 42.747 ppm.
Nitrogen dioxide (NO2) level in Joliet, Illinois at the moment is 5.177 ppb.
All Rights Reserved © Ambee Inc. 2025