Stay updated with real-time air quality in Rockford, 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)
20
Good
Rockford, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.99 μg/m³
0
55
155
255
425
605+
22.29 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
4.15 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Rockford, Illinois
Rockford, Illinois
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AQI 20
Good
3.17μg/m³
PM2.5
10.72μg/m³
PM10
22.01ppb
O3
0.39ppb
SO2
3.50ppb
NO2
0.21ppm
CO
AQI 20
Good
3.17μg/m³
PM2.5
10.88μg/m³
PM10
22.06ppb
O3
0.39ppb
SO2
3.50ppb
NO2
0.21ppm
CO
AQI 20
Good
3.12μg/m³
PM2.5
12.23μg/m³
PM10
22.21ppb
O3
0.42ppb
SO2
3.57ppb
NO2
0.21ppm
CO
AQI 22
Good
3.01μg/m³
PM2.5
13.51μg/m³
PM10
24.18ppb
O3
0.39ppb
SO2
3.73ppb
NO2
0.21ppm
CO
AQI 20
Good
2.97μg/m³
PM2.5
13.53μg/m³
PM10
22.02ppb
O3
0.47ppb
SO2
3.68ppb
NO2
0.21ppm
CO
AQI 22
Good
2.73μg/m³
PM2.5
8.63μg/m³
PM10
24.42ppb
O3
0.49ppb
SO2
3.05ppb
NO2
0.21ppm
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 Rockford, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Rockford, Illinois was at its worst at 05:00:00 on 2026-09-13.
In the last 24 hours, the best air quality in Rockford, Illinois was observed at 06:00:00 on 2026-09-13.
As of now, the AQI in Rockford, Illinois is 20, indicating Good conditions.
Rockford, Illinois air has the highest levels of O3.
Poor air quality in Rockford, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Rockford, Illinois are currently 3.3 μg/m3.
The PM10 concentration in Rockford, Illinois is 14.993 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Rockford, Illinois is 0.212 ppm.
Currently, Rockford, Illinois has a sulfur dioxide (SO2) concentration of 0.349 ppb.
The current ozone (O3) level in Rockford, Illinois at the moment is 22.285 ppm.
Nitrogen dioxide (NO2) level in Rockford, Illinois at the moment is 4.146 ppb.
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