Worst air pollution Naperville, today and tomorrow
Today (16 July): Air quality in Naperville is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 36.7/100).
Tomorrow (17 July 2026): Air quality in Naperville is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 37.6/100). 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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Naperville's air quality benefits from the flat Illinois prairie providing generally good wind dispersal, with vehicle emissions from I-88 and I-355 the primary local sources in this affluent Chicago western suburb. The Fox River corridor provides limited natural ventilation, while the broader Chicago metropolitan regional ozone burden from prevailing southwesterly winds and the region's industrial and vehicle emissions represents the primary background air quality concern throughout the summer ozone season across this rapidly growing DuPage County city.
Today - 16 July | Pollution peaks at 11:00
AQI:
Fair
36.7/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
10.1/100
NO2 (nitrogen dioxide):
Good
3.2/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Good
6.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
37.6/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
4.1/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
5.3/100
Pollen forecast in Naperville
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Naperville
Frequently Asked Questions
Is air quality bad in Naperville right now?
On 16 July 2026, overall air quality in Naperville is fair. AQI is the main air quality indicator at 36.7/100. Pollution peaks around 11:00 AM (O3: 36.7/100).
Will air quality be worse tomorrow in Naperville?
On 17 July 2026, air quality conditions in Naperville will be similar to today, with AQI forecast at fair at 37.6/100. Pollution peaks around 12:00 PM (O3: 37.6/100).
When is air pollution at its worst in Naperville?
Naperville follows a fairly predictable seasonal air quality pattern — spring and autumn tend to bring the cleanest, most stable air, whereas hot, humid summer conditions drive ozone formation, especially during heat waves. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Naperville 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