Worst air pollution Green Bay, today and tomorrow
Today (16 July): Air quality in Green Bay is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 37.5/100).
Tomorrow (17 July 2026): Air quality in Green Bay is fair. All pollutants stay as today. Pollution peaks around 7:00 AM (O3: 30.7/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Green Bay's air quality reflects the Lake Michigan coastal position in northeastern Wisconsin, with the bay's consistent lake winds providing maritime ventilation and the paper and packaging manufacturing industry in the Fox River corridor contributing elevated PM2.5 and sulfur compounds. The flat Wisconsin lake plain generally allows reasonable dispersal on most days, while summer regional ozone from Great Lakes industrial sources and the paper industry's VOC emissions contribute to the primary warm-season air quality concern.
Today - 16 July | Pollution peaks at 08:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
14.2/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
10.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 07:00
AQI:
Fair
30.7/100
PM2.5 (fine particles):
Good
10.6/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
14.9/100
O3 (ozone):
Fair
30.7/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
8.6/100
Pollen forecast in Green Bay
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Green Bay
Frequently Asked Questions
Is air quality bad in Green Bay right now?
On 16 July 2026, overall air quality in Green Bay is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 8:00 AM (O3: 37.5/100).
Will air quality be worse tomorrow in Green Bay?
On 17 July 2026, air quality conditions in Green Bay will be similar to today, with AQI forecast at fair at 30.7/100. Pollution peaks around 7:00 AM (O3: 30.7/100).
When is air pollution at its worst in Green Bay?
Green Bay's air quality follows a clear seasonal pattern. Typically, the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes, while 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 Green Bay 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
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