Worst air pollution Rockford, today and tomorrow
Today (16 July): Air quality in Rockford is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 36.3/100).
Tomorrow (17 July 2026): Air quality in Rockford is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 38.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Rockford's air quality reflects the Rock River valley's position in northern Illinois, with vehicle emissions from I-39 and I-90 and the surrounding manufacturing and aerospace industry corridor contributing elevated PM2.5. The flat northern Illinois terrain generally allows reasonable wind dispersal, while the broader Midwest regional airshed contributes elevated background ozone from agricultural and industrial sources during summer months across this mid-sized Illinois industrial city.
Today - 16 July | Pollution peaks at 12:00
AQI:
Fair
36.3/100
PM2.5 (fine particles):
Good
15.7/100
PM10 (coarse particles):
Good
12.6/100
NO2 (nitrogen dioxide):
Good
17.1/100
O3 (ozone):
Fair
36.3/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
7.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
38.8/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Good
18.3/100
O3 (ozone):
Fair
38.8/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
7.7/100
Pollen forecast in Rockford
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Rockford
Frequently Asked Questions
Is air quality bad in Rockford right now?
On 16 July 2026, overall air quality in Rockford is fair. AQI is the main air quality indicator at 36.3/100. Pollution peaks around 12:00 PM (O3: 36.3/100).
Will air quality be worse tomorrow in Rockford?
On 17 July 2026, air quality conditions in Rockford will be similar to today, with AQI forecast at fair at 38.8/100. Pollution peaks around 12:00 PM (O3: 38.8/100).
When is air pollution at its worst in Rockford?
Air quality in Rockford shifts across the year: between summer ozone and occasional winter inversions, spring and fall are the year's cleanest stretch, but the hottest, most humid summer days bring the year's worst ozone readings. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Rockford based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app