Worst air pollution Leigh-on-Sea, today and tomorrow

On 9 August 2026, overall air quality in Leigh-on-Sea is poor. AQI is the main air quality indicator at 61.9/100. Pollution peaks around 6:00 AM (NO2: 61.9/100).

On 10 August 2026, air quality conditions in Leigh-on-Sea will be better than today, with AQI forecast at fair at 25.8/100. Pollution peaks around 6:00 AM (NO2: 25.8/100).

Air quality in Leigh-on-Sea isn't the same all year round — it really shifts with the seasons. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let M4 traffic emissions linger rather than disperse. Summer brings a different issue — stronger sunlight can push up ozone levels on hot, sunny days, even though traffic pollution itself often disperses more easily. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.

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.