Worst air pollution Bolton, today and tomorrow

On 9 August 2026, overall air quality in Bolton is fair. AQI is the main air quality indicator at 33.9/100. Pollution peaks around 3:00 PM (O3: 33.9/100).

On 10 August 2026, air quality conditions in Bolton will be similar to today, with AQI forecast at fair at 21.4/100. Pollution peaks around 3:00 PM (O3: 21.4/100).

Spring and autumn don't usually cause much concern, sitting comfortably between winter's peak and summer's ozone spikes. You can roughly predict Bolton's air quality just by knowing the time of year. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let A34 traffic emissions linger rather than disperse. By summer, ozone tends to rise on bright days, while better ventilation generally keeps particulate and NO₂ levels lower than winter.

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.