Worst air pollution Lake Arrowhead, today and tomorrow

On 9 August 2026, overall air quality in Lake Arrowhead is fair. AQI is the main air quality indicator at 30.1/100. Pollution peaks around 1:00 PM (O3: 30.1/100).

On 10 August 2026, air quality conditions in Lake Arrowhead will be similar to today, with AQI forecast at fair at 25.6/100. Pollution peaks around 11:00 AM (O3: 25.6/100).

Air quality across Lake Arrowhead rises and falls with the seasons. Typically, the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, while summer and early autumn bring the highest ozone levels, and wildfire smoke can spike particulate readings sharply from August through October. Coastal breezes offer some relief compared to inland valley locations that see heavier smog 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.