Worst air pollution Old Saybrook, today and tomorrow

On 20 July 2026, overall air quality in Old Saybrook is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 11:00 AM (O3: 35.2/100).

On 21 July 2026, air quality conditions in Old Saybrook will be better than today, with AQI forecast at medium at 44.6/100. Pollution peaks around 8:00 AM (O3: 44.6/100).

Old Saybrook experiences a distinct seasonal swing in air quality — frequent frontal systems in spring and fall usually keep the air cleanest then, whereas summer heat waves, often worsened by haze drifting in from other regions, bring the year's worst air. Coastal sea breezes can offer some relief from inland summer ozone buildup.

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.