Stay updated with real-time air quality in Freeport, 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)
97
Moderate
Freeport, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
33.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
89.36 μg/m³
0
55
155
255
425
605+
40.93 ppb
0
55
71
86
201
201+
0.55 ppb
0
36
76
186
605
1005+
5.09 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Freeport, Illinois
Freeport, Illinois
Scroll To Air Quality MapLoading...
AQI 88
Moderate
28.56μg/m³
PM2.5
93.16μg/m³
PM10
39.69ppb
O3
0.32ppb
SO2
3.52ppb
NO2
0.30ppm
CO
AQI 115
Unhealthy for sensitive groups
41.29μg/m³
PM2.5
182.94μg/m³
PM10
42.76ppb
O3
0.71ppb
SO2
5.38ppb
NO2
0.31ppm
CO
AQI 115
Unhealthy for sensitive groups
40.82μg/m³
PM2.5
182.33μg/m³
PM10
37.03ppb
O3
0.70ppb
SO2
5.11ppb
NO2
0.31ppm
CO
AQI 115
Unhealthy for sensitive groups
40.71μg/m³
PM2.5
181.34μg/m³
PM10
37.08ppb
O3
0.70ppb
SO2
5.12ppb
NO2
0.31ppm
CO
AQI 105
Unhealthy for sensitive groups
37.28μg/m³
PM2.5
154.05μg/m³
PM10
34.58ppb
O3
0.70ppb
SO2
5.10ppb
NO2
0.31ppm
CO
AQI 94
Moderate
31.54μg/m³
PM2.5
69.82μg/m³
PM10
46.98ppb
O3
0.62ppb
SO2
5.34ppb
NO2
0.32ppm
CO
Air quality measurements for Illinois, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Freeport, Illinois is updated on an hourly basis.
The worst air quality in Freeport, Illinois was recorded at 05:00:00 on 2025-06-05.
The best air quality in Freeport, Illinois was recorded at 10:00:00 on 2025-06-05.
The real-time air quality index in Freeport, Illinois is 97, currently categorized as Moderate.
The most common pollutant in Freeport, Illinois is PM2.5.
If the air quality in Freeport, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Freeport, Illinois at present are 33.715 μg/m3.
The current PM10 levels in Freeport, Illinois are 89.356 μg/m3.
The current carbon monoxide (CO) level in Freeport, Illinois is 0.316 ppm.
The current sulfur dioxide (SO2) levels in Freeport, Illinois are 0.552 ppb.
The current ozone (O3) levels at Freeport, Illinois is 40.933 ppm.
The current nitrogen dioxide (NO2) levels at Freeport, Illinois is 5.095 ppb.
All Rights Reserved © Ambee Inc. 2025