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)
52
Moderate
Quincy, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.43 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
42.24 μg/m³
0
55
155
255
425
605+
13.95 ppb
0
55
71
86
201
201+
0.30 ppb
0
36
76
186
605
1005+
4.13 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Quincy, Illinois
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AQI 49
Good
9.46μg/m³
PM2.5
27.06μg/m³
PM10
8.59ppb
O3
0.29ppb
SO2
5.37ppb
NO2
0.36ppm
CO
AQI 38
Good
6.79μg/m³
PM2.5
30.08μg/m³
PM10
31.81ppb
O3
0.27ppb
SO2
2.62ppb
NO2
0.18ppm
CO
AQI 33
Good
6.21μg/m³
PM2.5
27.96μg/m³
PM10
31.88ppb
O3
0.30ppb
SO2
2.90ppb
NO2
0.18ppm
CO
AQI 27
Good
4.89μg/m³
PM2.5
15.47μg/m³
PM10
8.92ppb
O3
0.32ppb
SO2
3.90ppb
NO2
0.36ppm
CO
AQI 33
Good
6.50μg/m³
PM2.5
28.86μg/m³
PM10
31.55ppb
O3
0.24ppb
SO2
2.63ppb
NO2
0.18ppm
CO
AQI 38
Good
7.10μg/m³
PM2.5
29.53μg/m³
PM10
11.41ppb
O3
0.27ppb
SO2
6.34ppb
NO2
0.39ppm
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 2026-03-05.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 05:00:00 on 2026-03-06.
As of now, the AQI in Quincy, Illinois is 52, 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 10.432 μg/m3.
The PM10 concentration in Quincy, Illinois is 42.244 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.357 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 0.302 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 13.947 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 4.125 ppb.
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