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
3.89 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.95 μg/m³
0
55
155
255
425
605+
39.93 ppb
0
55
71
86
201
201+
1.08 ppb
0
36
76
186
605
1005+
1.18 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Quincy, Illinois
Quincy, Illinois
Scroll To Air Quality MapLoading...
AQI 38
Good
3.78μg/m³
PM2.5
18.19μg/m³
PM10
41.03ppb
O3
1.09ppb
SO2
1.11ppb
NO2
0.22ppm
CO
AQI 36
Good
3.66μg/m³
PM2.5
16.00μg/m³
PM10
38.90ppb
O3
0.29ppb
SO2
0.42ppb
NO2
0.13ppm
CO
AQI 38
Good
2.65μg/m³
PM2.5
11.00μg/m³
PM10
41.12ppb
O3
0.29ppb
SO2
0.38ppb
NO2
0.12ppm
CO
AQI 38
Good
3.83μg/m³
PM2.5
20.15μg/m³
PM10
40.81ppb
O3
1.09ppb
SO2
0.78ppb
NO2
0.23ppm
CO
AQI 38
Good
3.23μg/m³
PM2.5
14.05μg/m³
PM10
41.38ppb
O3
0.32ppb
SO2
0.43ppb
NO2
0.13ppm
CO
AQI 41
Good
5.83μg/m³
PM2.5
25.17μg/m³
PM10
43.51ppb
O3
0.91ppb
SO2
2.73ppb
NO2
0.20ppm
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 2026-07-22.
In the last 24 hours, the best air quality in Quincy, Illinois was observed at 03:00:00 on 2026-07-23.
As of now, the AQI in Quincy, Illinois is 37, 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 3.889 μg/m3.
The PM10 concentration in Quincy, Illinois is 19.955 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Quincy, Illinois is 0.223 ppm.
Currently, Quincy, Illinois has a sulfur dioxide (SO2) concentration of 1.078 ppb.
The current ozone (O3) level in Quincy, Illinois at the moment is 39.929 ppm.
Nitrogen dioxide (NO2) level in Quincy, Illinois at the moment is 1.184 ppb.
All Rights Reserved © Ambee Inc. 2025