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)
33
Good
Joliet, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.85 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.28 μg/m³
0
55
155
255
425
605+
14.38 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
5.35 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Joliet, Illinois
Joliet, Illinois
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AQI 33
Good
5.86μg/m³
PM2.5
25.35μg/m³
PM10
14.25ppb
O3
0.89ppb
SO2
5.36ppb
NO2
0.23ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
27.63μg/m³
PM10
11.63ppb
O3
0.90ppb
SO2
5.43ppb
NO2
0.23ppm
CO
AQI 33
Good
5.83μg/m³
PM2.5
24.08μg/m³
PM10
16.92ppb
O3
0.94ppb
SO2
5.32ppb
NO2
0.23ppm
CO
AQI 33
Good
5.81μg/m³
PM2.5
24.58μg/m³
PM10
15.26ppb
O3
0.85ppb
SO2
5.34ppb
NO2
0.23ppm
CO
AQI 33
Good
6.34μg/m³
PM2.5
28.45μg/m³
PM10
10.29ppb
O3
0.90ppb
SO2
5.49ppb
NO2
0.23ppm
CO
AQI 33
Good
5.65μg/m³
PM2.5
23.81μg/m³
PM10
13.50ppb
O3
0.91ppb
SO2
5.34ppb
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 Joliet, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Joliet, Illinois was at its worst at 03:00:00 on 2026-09-07.
In the last 24 hours, the best air quality in Joliet, Illinois was observed at 01:00:00 on 2026-09-07.
As of now, the AQI in Joliet, Illinois is 33, 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 5.847 μg/m3.
The PM10 concentration in Joliet, Illinois is 25.277 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Joliet, Illinois is 0.228 ppm.
Currently, Joliet, Illinois has a sulfur dioxide (SO2) concentration of 0.888 ppb.
The current ozone (O3) level in Joliet, Illinois at the moment is 14.384 ppm.
Nitrogen dioxide (NO2) level in Joliet, Illinois at the moment is 5.349 ppb.
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