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)
37
Good
Quincy, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.30 μg/m³
0
55
155
255
425
605+
39.89 ppb
0
55
71
86
201
201+
0.79 ppb
0
36
76
186
605
1005+
3.08 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Quincy, Illinois
Quincy, Illinois
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AQI 49
Good
8.53μg/m³
PM2.5
39.49μg/m³
PM10
26.18ppb
O3
0.79ppb
SO2
1.39ppb
NO2
0.17ppm
CO
AQI 34
Good
6.07μg/m³
PM2.5
26.72μg/m³
PM10
36.58ppb
O3
0.19ppb
SO2
2.77ppb
NO2
0.17ppm
CO
AQI 36
Good
4.12μg/m³
PM2.5
18.02μg/m³
PM10
38.85ppb
O3
0.19ppb
SO2
2.77ppb
NO2
0.17ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
41.04μg/m³
PM10
29.96ppb
O3
0.91ppb
SO2
1.62ppb
NO2
0.18ppm
CO
AQI 35
Good
4.79μg/m³
PM2.5
20.86μg/m³
PM10
38.46ppb
O3
0.21ppb
SO2
2.74ppb
NO2
0.17ppm
CO
AQI 25
Good
3.67μg/m³
PM2.5
19.11μg/m³
PM10
27.41ppb
O3
0.69ppb
SO2
1.90ppb
NO2
0.15ppm
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 08:00:00 on 2025-07-20.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 02:00:00 on 2025-07-20.
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 8.701 μg/m3.
The PM10 concentration in Quincy, Illinois is 35.839 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.174 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 0.668 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 16.139 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 1.497 ppb.
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