Worst air pollution DeKalb, today and tomorrow
Today (9 August): Air quality in DeKalb is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 33.4/100).
Tomorrow (10 August 2026): Air quality in DeKalb is fair. AQI improves to medium; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 52.3/100). Airmine updates local air quality forecasts four times daily.
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Air quality in DeKalb is driven mostly by Plains agricultural dust — spring planting and harvest bring short bursts of elevated dust. Day-to-day conditions in DeKalb can still vary with local weather, wind direction, and time of year. Checking current readings is still the best way to plan outdoor activity around DeKalb.
Today - 9 August | Pollution peaks at 00:00
AQI:
Fair
33.4/100
PM2.5 (fine particles):
Good
10.8/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
33.4/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.0/100
PM1 (ultrafine particles):
Good
13.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 23:00
AQI:
Medium
52.3/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Medium
52.3/100
O3 (ozone):
Fair
34.7/100
SO2 (sulfur dioxide):
Good
5.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
8.6/100
Pollen forecast in DeKalb
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in DeKalb
Frequently Asked Questions
Is air quality bad in DeKalb right now?
On 9 August 2026, overall air quality in DeKalb is fair. AQI is the main air quality indicator at 33.4/100. Pollution peaks around 12:00 AM (NO2: 33.4/100).
Will air quality be worse tomorrow in DeKalb?
On 10 August 2026, air quality conditions in DeKalb will be similar to today, with O3 forecast at fair at 34.7/100. Pollution peaks around 11:00 PM (NO2: 52.3/100).
When is air pollution at its worst in DeKalb?
DeKalb's air quality has a clear seasonal rhythm — 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 DeKalb 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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