Stay updated with real-time air quality in Frankfort, 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)
28
Good
Frankfort, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.64 μg/m³
0
55
155
255
425
605+
30.15 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
2.07 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Frankfort, Illinois
Frankfort, Illinois
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AQI 28
Good
4.67μg/m³
PM2.5
22.06μg/m³
PM10
30.46ppb
O3
0.38ppb
SO2
2.14ppb
NO2
0.21ppm
CO
AQI 33
Good
5.64μg/m³
PM2.5
25.13μg/m³
PM10
27.09ppb
O3
0.31ppb
SO2
2.74ppb
NO2
0.22ppm
CO
AQI 29
Good
4.65μg/m³
PM2.5
21.88μg/m³
PM10
30.59ppb
O3
0.38ppb
SO2
2.19ppb
NO2
0.21ppm
CO
AQI 27
Good
5.21μg/m³
PM2.5
23.47μg/m³
PM10
28.02ppb
O3
0.36ppb
SO2
2.00ppb
NO2
0.21ppm
CO
AQI 28
Good
5.04μg/m³
PM2.5
20.77μg/m³
PM10
29.55ppb
O3
0.36ppb
SO2
1.77ppb
NO2
0.21ppm
CO
AQI 33
Good
5.59μg/m³
PM2.5
23.54μg/m³
PM10
25.75ppb
O3
0.35ppb
SO2
2.08ppb
NO2
0.21ppm
CO
The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Frankfort, Illinois are available every hour.
Frankfort, Illinois experienced its worst air quality at 07:00:00, 2026-04-27.
The best air quality in Frankfort, Illinois was observed at 11:00:00 on 2026-04-27.
The air quality in Frankfort, Illinois right now is Good, with an AQI of 28.
In Frankfort, Illinois, O3 is the most frequently found pollutant.
When air quality in Frankfort, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Frankfort, Illinois currently has a PM2.5 concentration of 4.701 μg/m3.
Frankfort, Illinois currently has a PM10 concentration of 20.644 μg/m3.
The current carbon monoxide (CO) level in Frankfort, Illinois is 0.214 ppm.
The current sulfur dioxide (SO2) concentration in Frankfort, Illinois is 0.369 ppb.
Frankfort, Illinois currently has an ozone (O3) concentration of 30.148 ppm.
The current level of nitrogen dioxide (NO2) in Frankfort, Illinois is 2.066 ppb.
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