Worst air pollution Riverwalk - Chicago, today and tomorrow
Today (18 July): Air quality in Riverwalk is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 37.7/100).
Tomorrow (19 July 2026): Air quality in Riverwalk is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 37.3/100). 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.
Chicago's Riverwalk air quality reflects the Chicago River canyon corridor, with vehicle traffic on Wacker Drive and the surrounding dense downtown Loop skyscraper canyon generating elevated NOₓ and PM2.5 in the enclosed river channel geometry. The river provides limited ventilation, while the Lake Michigan lake breeze periodically flushes the downtown canyon and the Riverwalk's enclosed urban canyon character maintains consistently elevated downtown Chicago readings throughout most of the year.
Today - 18 July | Pollution peaks at 08:00
AQI:
Fair
37.7/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
7.7/100
NO2 (nitrogen dioxide):
Fair
21.2/100
O3 (ozone):
Fair
37.7/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 19 July | Pollution peaks at 10:00
AQI:
Fair
37.3/100
PM2.5 (fine particles):
Good
13.6/100
PM10 (coarse particles):
Good
9.4/100
NO2 (nitrogen dioxide):
Good
12.1/100
O3 (ozone):
Fair
37.3/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
8.4/100
Other Landmarks in Chicago
Sports venues in Chicago
Frequently Asked Questions
Is air quality bad in Riverwalk right now?
On 18 July 2026, overall air quality in Riverwalk is fair. AQI is the main air quality indicator at 37.7/100. Pollution peaks around 8:00 AM (O3: 37.7/100).
Will air quality be worse tomorrow in Riverwalk?
On 19 July 2026, air quality conditions in Riverwalk will be similar to today, with AQI forecast at fair at 37.3/100. Pollution peaks around 10:00 AM (O3: 37.3/100).
When is air pollution at its worst in Riverwalk?
Riverwalk's air quality follows a clear seasonal pattern — spring and autumn tend to bring the cleanest, most stable air, whereas the hottest, most humid summer days bring the year's worst ozone readings. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Riverwalk 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.
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: 18 July 2026 at 21:30 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