Worst air pollution Waterloo, today and tomorrow
Today (9 August): Air quality in Waterloo is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 34.0/100).
Tomorrow (10 August 2026): Air quality in Waterloo is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 33.4/100). Airmine updates local air quality forecasts four times daily.
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Waterloo's air quality in Iowa benefits from the flat northern Iowa prairie providing excellent wind dispersal, with vehicle emissions from US-218 and the John Deere manufacturing and meatpacking industry contributing distinctive agricultural and industrial PM2.5 alongside the primary local vehicle sources. Agricultural ammonia from surrounding Cedar Valley corn and hog operations contributes secondary particulate formation.
Today - 9 August | Pollution peaks at 07:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
9.4/100
PM10 (coarse particles):
Good
6.5/100
NO2 (nitrogen dioxide):
Good
15.9/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
6.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Fair
33.4/100
PM2.5 (fine particles):
Good
11.6/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Fair
26.7/100
O3 (ozone):
Fair
33.4/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
7.6/100
Pollen forecast in Waterloo
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Waterloo
Frequently Asked Questions
Is air quality bad in Waterloo right now?
On 9 August 2026, overall air quality in Waterloo is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 7:00 AM (O3: 34.0/100).
Will air quality be worse tomorrow in Waterloo?
On 10 August 2026, air quality conditions in Waterloo will be similar to today, with AQI forecast at fair at 33.4/100. Pollution peaks around 12:00 PM (O3: 33.4/100).
When is air pollution at its worst in Waterloo?
Waterloo sees air quality change through the year. In short, the cleanest conditions usually come in winter, once the growing season dust and pollen have passed, whereas summer heat and humidity drive ozone formation, and agricultural dust can spike particulate levels during planting and harvest. Farm-heavy surrounding land is the main source of the seasonal dust spikes.
Are air quality levels in Waterloo 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: 9 August 2026 at 20:27 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.
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