Stay updated with real-time air quality in Quincy, 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)
27
Good
Quincy, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.88 μg/m³
0
55
155
255
425
605+
28.82 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
3.17 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Quincy, Illinois
Quincy, Illinois
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AQI 23
Good
3.23μg/m³
PM2.5
13.62μg/m³
PM10
25.34ppb
O3
0.51ppb
SO2
2.62ppb
NO2
0.19ppm
CO
AQI 27
Good
4.74μg/m³
PM2.5
21.00μg/m³
PM10
14.51ppb
O3
0.25ppb
SO2
6.02ppb
NO2
0.18ppm
CO
AQI 33
Good
5.53μg/m³
PM2.5
23.97μg/m³
PM10
16.59ppb
O3
0.31ppb
SO2
5.58ppb
NO2
0.18ppm
CO
AQI 27
Good
1.98μg/m³
PM2.5
12.27μg/m³
PM10
29.38ppb
O3
0.77ppb
SO2
3.10ppb
NO2
0.19ppm
CO
AQI 33
Good
5.59μg/m³
PM2.5
23.96μg/m³
PM10
17.04ppb
O3
0.22ppb
SO2
5.94ppb
NO2
0.18ppm
CO
AQI 27
Good
3.91μg/m³
PM2.5
13.14μg/m³
PM10
29.08ppb
O3
0.40ppb
SO2
3.83ppb
NO2
0.19ppm
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 Quincy, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Quincy, Illinois was at its worst at 10:00:00 on 2026-07-10.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 02:00:00 on 2026-07-10.
As of now, the AQI in Quincy, Illinois is 27, indicating Good conditions.
Quincy, Illinois air has the highest levels of O3.
Poor air quality in Quincy, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Quincy, Illinois are currently 2.795 μg/m3.
The PM10 concentration in Quincy, Illinois is 18.884 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.221 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 0.63 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 28.816 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 3.169 ppb.
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