Stay updated with real-time air quality in Washington, 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
Washington, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
10.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
47.76 μg/m³
0
55
155
255
425
605+
35.23 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
3.71 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Washington, Illinois
Washington, Illinois
Scroll To Air Quality MapLoading...
AQI 81
Moderate
24.84μg/m³
PM2.5
59.04μg/m³
PM10
21.98ppb
O3
1.11ppb
SO2
10.70ppb
NO2
0.20ppm
CO
AQI 82
Moderate
26.44μg/m³
PM2.5
102.66μg/m³
PM10
24.92ppb
O3
1.15ppb
SO2
10.61ppb
NO2
0.20ppm
CO
AQI 88
Moderate
29.38μg/m³
PM2.5
126.48μg/m³
PM10
22.82ppb
O3
1.14ppb
SO2
10.69ppb
NO2
0.20ppm
CO
AQI 62
Moderate
15.36μg/m³
PM2.5
50.95μg/m³
PM10
22.40ppb
O3
1.20ppb
SO2
10.47ppb
NO2
0.20ppm
CO
AQI 79
Moderate
24.00μg/m³
PM2.5
104.98μg/m³
PM10
36.99ppb
O3
1.10ppb
SO2
7.82ppb
NO2
0.20ppm
CO
AQI 79
Moderate
24.01μg/m³
PM2.5
104.78μg/m³
PM10
36.87ppb
O3
1.10ppb
SO2
7.85ppb
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 Washington, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Washington, Illinois was at its worst at 02:00:00 on 2025-07-08.
In the last 24 hours, the best air quality in Washington, Illinois was observed at 08:00:00 on 2025-07-07.
As of now, the AQI in Washington, Illinois is 79, indicating Moderate conditions.
Washington, Illinois air has the highest levels of PM2.5.
Poor air quality in Washington, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Washington, Illinois are currently 24.209 μg/m3.
The PM10 concentration in Washington, Illinois is 100.259 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Washington, Illinois is 0.2 ppm.
Currently, Washington, Illinois has a sulfur dioxide (SO2) concentration of 1.11 ppb.
The current ozone (O3) level in Washington, Illinois at the moment is 22.748 ppm.
Nitrogen dioxide (NO2) level in Washington, Illinois at the moment is 9.863 ppb.
All Rights Reserved © Ambee Inc. 2025