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
9.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
42.57 μg/m³
0
55
155
255
425
605+
46.18 ppb
0
55
71
86
201
201+
1.31 ppb
0
36
76
186
605
1005+
2.21 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Quincy, Illinois
Quincy, Illinois
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AQI 49
Good
9.13μg/m³
PM2.5
43.66μg/m³
PM10
44.51ppb
O3
1.13ppb
SO2
2.50ppb
NO2
0.33ppm
CO
AQI 48
Good
7.18μg/m³
PM2.5
31.72μg/m³
PM10
51.58ppb
O3
0.50ppb
SO2
0.54ppb
NO2
0.14ppm
CO
AQI 46
Good
5.79μg/m³
PM2.5
25.00μg/m³
PM10
50.35ppb
O3
0.56ppb
SO2
0.52ppb
NO2
0.15ppm
CO
AQI 43
Good
5.75μg/m³
PM2.5
19.78μg/m³
PM10
45.65ppb
O3
1.75ppb
SO2
3.20ppb
NO2
0.33ppm
CO
AQI 49
Good
7.95μg/m³
PM2.5
34.68μg/m³
PM10
52.93ppb
O3
0.50ppb
SO2
0.56ppb
NO2
0.14ppm
CO
AQI 49
Good
8.66μg/m³
PM2.5
44.99μg/m³
PM10
43.79ppb
O3
1.56ppb
SO2
3.71ppb
NO2
0.32ppm
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 04:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 03:00:00 on 2026-10-22.
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 9.645 μg/m3.
The PM10 concentration in Quincy, Illinois is 42.571 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.21 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 1.314 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 46.181 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 2.213 ppb.
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