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)
58
Moderate
Quincy, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.74 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
65.77 μg/m³
0
55
155
255
425
605+
14.88 ppb
0
55
71
86
201
201+
0.43 ppb
0
36
76
186
605
1005+
3.21 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 54
Moderate
8.45μg/m³
PM2.5
60.99μg/m³
PM10
12.01ppb
O3
0.62ppb
SO2
3.52ppb
NO2
0.19ppm
CO
AQI 64
Moderate
15.68μg/m³
PM2.5
69.71μg/m³
PM10
10.57ppb
O3
0.17ppb
SO2
2.37ppb
NO2
0.19ppm
CO
AQI 71
Moderate
20.03μg/m³
PM2.5
88.92μg/m³
PM10
9.75ppb
O3
0.21ppb
SO2
3.06ppb
NO2
0.21ppm
CO
AQI 44
Good
8.37μg/m³
PM2.5
42.45μg/m³
PM10
15.38ppb
O3
0.91ppb
SO2
3.25ppb
NO2
0.19ppm
CO
AQI 62
Moderate
14.62μg/m³
PM2.5
65.45μg/m³
PM10
11.51ppb
O3
0.18ppb
SO2
2.40ppb
NO2
0.19ppm
CO
AQI 73
Moderate
20.91μg/m³
PM2.5
91.65μg/m³
PM10
8.30ppb
O3
0.25ppb
SO2
3.27ppb
NO2
0.21ppm
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 01:00:00 on 2025-12-07.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 08:00:00 on 2025-12-06.
As of now, the AQI in Quincy, Illinois is 60, indicating Moderate conditions.
Quincy, Illinois air has the highest levels of PM2.5.
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 13.897 μg/m3.
The PM10 concentration in Quincy, Illinois is 71.068 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.23 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 0.533 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 11.69 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 3.011 ppb.
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