Stay updated with real-time air quality in Ottawa, 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
Ottawa, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
10.42 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
46.13 μg/m³
0
55
155
255
425
605+
42.63 ppb
0
55
71
86
201
201+
1.05 ppb
0
36
76
186
605
1005+
3.14 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Ottawa, Illinois
Ottawa, Illinois
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AQI 49
Good
8.61μg/m³
PM2.5
37.85μg/m³
PM10
23.92ppb
O3
0.19ppb
SO2
6.25ppb
NO2
0.18ppm
CO
AQI 23
Good
3.86μg/m³
PM2.5
16.64μg/m³
PM10
25.38ppb
O3
0.45ppb
SO2
5.63ppb
NO2
0.30ppm
CO
AQI 27
Good
3.70μg/m³
PM2.5
18.49μg/m³
PM10
28.56ppb
O3
0.41ppb
SO2
5.62ppb
NO2
0.31ppm
CO
AQI 27
Good
3.70μg/m³
PM2.5
17.03μg/m³
PM10
28.55ppb
O3
0.42ppb
SO2
5.51ppb
NO2
0.31ppm
CO
AQI 26
Good
3.82μg/m³
PM2.5
15.43μg/m³
PM10
28.37ppb
O3
0.43ppb
SO2
5.76ppb
NO2
0.31ppm
CO
AQI 26
Good
3.54μg/m³
PM2.5
15.38μg/m³
PM10
27.72ppb
O3
0.46ppb
SO2
6.54ppb
NO2
0.30ppm
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 Ottawa, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Ottawa, Illinois was at its worst at 08:00:00 on 2025-07-19.
In the last 24 hours, the best air quality in Ottawa, Illinois was observed at 06:00:00 on 2025-07-20.
As of now, the AQI in Ottawa, Illinois is 31, indicating Good conditions.
Ottawa, Illinois air has the highest levels of O3.
Poor air quality in Ottawa, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Ottawa, Illinois are currently 5.48 μg/m3.
The PM10 concentration in Ottawa, Illinois is 23.953 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Ottawa, Illinois is 0.186 ppm.
Currently, Ottawa, Illinois has a sulfur dioxide (SO2) concentration of 0.186 ppb.
The current ozone (O3) level in Ottawa, Illinois at the moment is 33.545 ppm.
Nitrogen dioxide (NO2) level in Ottawa, Illinois at the moment is 6.032 ppb.
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