Worst air pollution Capitol Square Madison - Madison, today and tomorrow
Today (16 July): Air quality in Capitol Square Madison is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 33.2/100).
Tomorrow (17 July 2026): Air quality in Capitol Square Madison is fair. All pollutants stay as today. Pollution peaks around 7:00 AM (O3: 27.6/100). 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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Madison's Capitol Square air quality reflects the historic downtown Wisconsin State Capitol landmark, with vehicle traffic on the surrounding State Street and King Street corridors contributing local sources. The Capitol's elevated dome and the surrounding square's open geometry provide reasonable dispersal, while the lake breezes from both Mendota and Monona provide background ventilation and Capitol Square generally maintains moderate Madison downtown readings throughout most of the year.
Today - 16 July | Pollution peaks at 10:00
AQI:
Fair
33.2/100
PM2.5 (fine particles):
Good
11.6/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Fair
30.7/100
O3 (ozone):
Fair
33.2/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.8/100
PM1 (ultrafine particles):
Good
8.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 07:00
AQI:
Fair
27.6/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Fair
26.0/100
O3 (ozone):
Fair
27.6/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
5.4/100
Other Landmarks in Madison
Sports venues in Madison
Frequently Asked Questions
Is air quality bad in Capitol Square Madison right now?
On 16 July 2026, overall air quality in Capitol Square Madison is fair. AQI is the main air quality indicator at 33.2/100. Pollution peaks around 10:00 AM (O3: 33.2/100).
Will air quality be worse tomorrow in Capitol Square Madison?
On 17 July 2026, air quality conditions in Capitol Square Madison will be similar to today, with AQI forecast at fair at 27.6/100. Pollution peaks around 7:00 AM (O3: 27.6/100).
When is air pollution at its worst in Capitol Square Madison?
This neighborhood in Madison sees air quality shift through the year: the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes, but 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 Capitol Square Madison 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?
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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