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)
49
Good
Quincy, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.82 μg/m³
0
55
155
255
425
605+
42.80 ppb
0
55
71
86
201
201+
1.55 ppb
0
36
76
186
605
1005+
3.14 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Very high
Quincy, Illinois
Quincy, Illinois
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AQI 49
Good
8.91μg/m³
PM2.5
27.37μg/m³
PM10
41.10ppb
O3
1.51ppb
SO2
3.22ppb
NO2
0.21ppm
CO
AQI 40
Good
5.43μg/m³
PM2.5
23.29μg/m³
PM10
43.00ppb
O3
0.13ppb
SO2
1.30ppb
NO2
0.13ppm
CO
AQI 41
Good
5.40μg/m³
PM2.5
23.00μg/m³
PM10
43.67ppb
O3
0.31ppb
SO2
1.42ppb
NO2
0.14ppm
CO
AQI 49
Good
8.64μg/m³
PM2.5
27.77μg/m³
PM10
37.45ppb
O3
1.27ppb
SO2
2.86ppb
NO2
0.21ppm
CO
AQI 38
Good
5.43μg/m³
PM2.5
23.05μg/m³
PM10
41.14ppb
O3
0.14ppb
SO2
1.31ppb
NO2
0.14ppm
CO
AQI 49
Good
9.14μg/m³
PM2.5
38.38μg/m³
PM10
46.54ppb
O3
1.33ppb
SO2
6.55ppb
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 10:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 09:00:00 on 2026-04-23.
As of now, the AQI in Quincy, Illinois is 49, indicating Good 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 8.949 μg/m3.
The PM10 concentration in Quincy, Illinois is 27.822 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.211 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 1.555 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 42.803 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 3.138 ppb.
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