Worst air pollution Hoddesdon, today and tomorrow

On 20 September 2026, overall air quality in Hoddesdon is moderate. AQI is the main air quality indicator at 42.1/100. Pollution peaks around 9:00 PM (NO2: 42.1/100).

On 21 September 2026, air quality conditions in Hoddesdon will be worse than today, with AQI forecast at poor at 64.5/100. Pollution peaks around 8:00 PM (NO2: 64.5/100).

Here's the thing about Hoddesdon: air quality has a clear seasonal rhythm. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let M4 traffic emissions linger rather than disperse. 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.