Stay updated with real-time air quality in Belvidere, 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)
96
Moderate
Belvidere, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
33.02 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
80.71 μg/m³
0
55
155
255
425
605+
27.12 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
7.25 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Belvidere, Illinois
Belvidere, Illinois
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AQI 117
Unhealthy for sensitive groups
41.54μg/m³
PM2.5
180.39μg/m³
PM10
21.34ppb
O3
0.60ppb
SO2
6.00ppb
NO2
0.32ppm
CO
AQI 117
Unhealthy for sensitive groups
41.66μg/m³
PM2.5
181.11μg/m³
PM10
21.06ppb
O3
0.60ppb
SO2
6.01ppb
NO2
0.32ppm
CO
AQI 117
Unhealthy for sensitive groups
41.99μg/m³
PM2.5
186.92μg/m³
PM10
28.78ppb
O3
0.61ppb
SO2
6.97ppb
NO2
0.32ppm
CO
AQI 107
Unhealthy for sensitive groups
37.90μg/m³
PM2.5
157.13μg/m³
PM10
23.24ppb
O3
0.60ppb
SO2
5.20ppb
NO2
0.32ppm
CO
AQI 92
Moderate
30.65μg/m³
PM2.5
110.37μg/m³
PM10
23.12ppb
O3
0.61ppb
SO2
3.34ppb
NO2
0.32ppm
CO
AQI 129
Unhealthy for sensitive groups
46.74μg/m³
PM2.5
197.50μg/m³
PM10
32.71ppb
O3
0.66ppb
SO2
8.69ppb
NO2
0.33ppm
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 Belvidere, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Belvidere, Illinois was at its worst at 10:00:00 on 2025-06-05.
In the last 24 hours, the best air quality in Belvidere, Illinois was observed at 10:00:00 on 2025-06-05.
As of now, the AQI in Belvidere, Illinois is 96, indicating Moderate conditions.
Belvidere, Illinois air has the highest levels of PM2.5.
Poor air quality in Belvidere, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Belvidere, Illinois are currently 33.019 μg/m3.
The PM10 concentration in Belvidere, Illinois is 80.707 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belvidere, Illinois is 0.323 ppm.
Currently, Belvidere, Illinois has a sulfur dioxide (SO2) concentration of 0.632 ppb.
The current ozone (O3) level in Belvidere, Illinois at the moment is 27.116 ppm.
Nitrogen dioxide (NO2) level in Belvidere, Illinois at the moment is 7.247 ppb.
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