Worst air pollution D4 - Dennis, today and tomorrow

On 30 August 2026, overall air quality in D4 is fair. AQI is the main air quality indicator at 37.7/100. Pollution peaks around 11:00 AM (O3: 37.7/100).

On 31 August 2026, air quality conditions in D4 will be similar to today, with AQI forecast at fair at 31.7/100. Pollution peaks around 11:00 AM (O3: 31.7/100).

Air quality often dips most sharply during winter in this area, when winter inversions trap local heating smoke in place for days at a time. Once summer sets in, ground-level ozone becomes the bigger local concern, as hot, sunny days accelerate local ozone formation, occasionally compounded by drifting smoke. The transitional months of spring and fall typically see the year's lowest particulate and ozone levels.

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.

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.