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)
49
Good
Ottawa, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.94 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.39 μg/m³
0
55
155
255
425
605+
40.58 ppb
0
55
71
86
201
201+
0.43 ppb
0
36
76
186
605
1005+
2.08 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Ottawa, Illinois
Scroll To Air Quality MapLoading...
AQI 38
Good
3.30μg/m³
PM2.5
14.75μg/m³
PM10
41.18ppb
O3
0.43ppb
SO2
1.57ppb
NO2
0.11ppm
CO
AQI 38
Good
6.94μg/m³
PM2.5
29.13μg/m³
PM10
28.45ppb
O3
1.27ppb
SO2
2.27ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.69μg/m³
PM2.5
39.29μg/m³
PM10
27.99ppb
O3
1.32ppb
SO2
4.22ppb
NO2
0.24ppm
CO
AQI 49
Good
8.53μg/m³
PM2.5
33.78μg/m³
PM10
27.64ppb
O3
1.29ppb
SO2
2.62ppb
NO2
0.24ppm
CO
AQI 38
Good
6.94μg/m³
PM2.5
18.73μg/m³
PM10
27.23ppb
O3
1.22ppb
SO2
2.61ppb
NO2
0.25ppm
CO
AQI 33
Good
5.94μg/m³
PM2.5
25.20μg/m³
PM10
26.04ppb
O3
0.84ppb
SO2
4.42ppb
NO2
0.25ppm
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 04:00:00 on 2026-03-06.
In the last 24 hours, the best air quality in Ottawa, Illinois was observed at 12:00:00 on 2026-03-06.
As of now, the AQI in Ottawa, Illinois is 49, indicating Good conditions.
Ottawa, Illinois air has the highest levels of PM2.5.
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 8.938 μg/m3.
The PM10 concentration in Ottawa, Illinois is 39.393 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Ottawa, Illinois is 0.111 ppm.
Currently, Ottawa, Illinois has a sulfur dioxide (SO2) concentration of 0.434 ppb.
The current ozone (O3) level in Ottawa, Illinois at the moment is 40.582 ppm.
Nitrogen dioxide (NO2) level in Ottawa, Illinois at the moment is 2.085 ppb.
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