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)
19
Good
Quincy, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.12 μg/m³
0
55
155
255
425
605+
20.01 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
1.68 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Quincy, Illinois
Quincy, Illinois
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AQI 20
Good
2.84μg/m³
PM2.5
12.55μg/m³
PM10
21.97ppb
O3
0.74ppb
SO2
2.26ppb
NO2
0.15ppm
CO
AQI 21
Good
1.97μg/m³
PM2.5
8.00μg/m³
PM10
22.74ppb
O3
0.25ppb
SO2
1.37ppb
NO2
0.11ppm
CO
AQI 21
Good
1.63μg/m³
PM2.5
7.00μg/m³
PM10
23.01ppb
O3
0.24ppb
SO2
1.35ppb
NO2
0.11ppm
CO
AQI 13
Good
2.13μg/m³
PM2.5
9.86μg/m³
PM10
14.45ppb
O3
0.84ppb
SO2
2.06ppb
NO2
0.16ppm
CO
AQI 20
Good
2.19μg/m³
PM2.5
9.00μg/m³
PM10
21.82ppb
O3
0.22ppb
SO2
1.35ppb
NO2
0.11ppm
CO
AQI 21
Good
2.65μg/m³
PM2.5
12.33μg/m³
PM10
23.01ppb
O3
0.56ppb
SO2
3.57ppb
NO2
0.14ppm
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 09:00:00 on 2025-10-21.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 09:00:00 on 2025-10-22.
As of now, the AQI in Quincy, Illinois is 19, 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 2.715 μg/m3.
The PM10 concentration in Quincy, Illinois is 12.121 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.149 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 0.51 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 20.007 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 1.678 ppb.
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