Worst air pollution Appleton, today and tomorrow
Today (30 August): Air quality in Appleton is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 18.1/100).
Tomorrow (31 August 2026): Air quality in Appleton is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 23.7/100). 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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Appleton's air quality benefits from Fox River valley's position in the Lake Michigan coastal region, with consistent Great Lakes westerly and northerly winds providing clean maritime ventilation from the lake across this Wisconsin paper and manufacturing city. Vehicle emissions from US-41 and the surrounding paper and specialty manufacturing industry contribute local sources, while summer regional ozone from the broader Great Lakes industrial airshed is the primary warm-season concern across the Fox Cities metropolitan area.
Today - 30 August | Pollution peaks at 09:00
AQI:
Good
18.1/100
PM2.5 (fine particles):
Good
3.8/100
PM10 (coarse particles):
Good
1.6/100
NO2 (nitrogen dioxide):
Good
5.2/100
O3 (ozone):
Good
18.1/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
2.0/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 11:00
AQI:
Fair
23.7/100
PM2.5 (fine particles):
Good
6.6/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
6.7/100
O3 (ozone):
Fair
23.7/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
2.8/100
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Frequently Asked Questions
Is air quality bad in Appleton right now?
On 30 August 2026, overall air quality in Appleton is good. AQI is the main air quality indicator at 18.1/100. Pollution peaks around 9:00 AM (O3: 18.1/100).
Will air quality be worse tomorrow in Appleton?
On 31 August 2026, air quality conditions in Appleton will be worse than today, with AQI forecast at fair at 23.7/100. Pollution peaks around 11:00 AM (O3: 23.7/100).
When is air pollution at its worst in Appleton?
Appleton follows a fairly predictable seasonal air quality pattern. Typically, the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes, while summer heat waves are the main driver of poor air quality, as ozone builds under stagnant, humid conditions. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Appleton 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 30 August 2026 at 14:32 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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