Worst air pollution Crocus Hill - Saint Paul, today and tomorrow

On 20 September 2026, overall air quality in Crocus Hill is good. AQI is the main air quality indicator at 19.5/100. Pollution peaks around 7:00 AM (O3: 19.5/100).

On 21 September 2026, air quality conditions in Crocus Hill will be similar to today, with AQI forecast at good at 16.1/100. Pollution peaks around 2:00 PM (NO2: 16.1/100).

This part of the city typically experiences its worst air quality during the coldest months, when dense traffic emissions and home heating pile up under temperature inversions that resist mixing. By summer, ozone becomes the more pressing urban issue, which forms readily from traffic emissions baking in strong sunlight, and can spike further during wildfire smoke events.

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.