Worst air pollution Saint Clair Township, today and tomorrow

On 9 August 2026, overall air quality in Saint Clair Township is fair. AQI is the main air quality indicator at 38.1/100. Pollution peaks around 11:00 AM (O3: 38.1/100).

On 10 August 2026, air quality conditions in Saint Clair Township will be similar to today, with AQI forecast at fair at 36.1/100. Pollution peaks around 11:00 AM (O3: 36.1/100).

This area typically sees its worst air quality during the winter season, driven by heating season smoke that lingers under stagnant, cold winter air. The warmer months shift the main air quality risk here toward ozone, with summer's heat and sunlight together producing some of the year's highest local ozone levels. Between the winter and summer extremes, spring and fall usually bring the year's most consistently clear air.

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.