Worst air pollution La Crosse, today and tomorrow
Today (16 July): Air quality in La Crosse is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 35.5/100).
Tomorrow (17 July 2026): Air quality in La Crosse is fair. All pollutants stay as today. Pollution peaks around 6:00 AM (O3: 30.1/100). 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
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La Crosse's air quality reflects the Mississippi River valley's topographic enclosure between the Bluffs on both sides of the river in western Wisconsin, with vehicle emissions from I-90 and the surrounding manufacturing and logistics industry contributing local sources. The valley's partial topographic enclosure concentrates emissions under calm conditions, while the Mississippi River corridor provides some ventilation and summer regional ozone is the primary warm-season concern.
Today - 16 July | Pollution peaks at 09:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
7.2/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
5.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 06:00
AQI:
Fair
30.1/100
PM2.5 (fine particles):
Good
6.0/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
30.1/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
5.2/100
Pollen forecast in La Crosse
View pollen forecastFrequently Asked Questions
Is air quality bad in La Crosse right now?
On 16 July 2026, overall air quality in La Crosse is fair. AQI is the main air quality indicator at 35.5/100. Pollution peaks around 9:00 AM (O3: 35.5/100).
Will air quality be worse tomorrow in La Crosse?
On 17 July 2026, air quality conditions in La Crosse will be similar to today, with AQI forecast at fair at 30.1/100. Pollution peaks around 6:00 AM (O3: 30.1/100).
When is air pollution at its worst in La Crosse?
Air quality across La Crosse rises and falls with the seasons. Typically, between summer ozone and occasional winter inversions, spring and fall are the year's cleanest stretch, while prolonged summer heat waves are when air quality most often dips into unhealthy territory. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in La Crosse 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