Worst air pollution Basalt, today and tomorrow

On 20 September 2026, overall air quality in Basalt is fair. AQI is the main air quality indicator at 36.7/100. Pollution peaks around 10:00 AM (O3: 36.7/100).

On 21 September 2026, air quality conditions in Basalt will be worse than today, with AQI forecast at moderate at 44.7/100. Pollution peaks around 7:00 PM (NO2: 44.7/100).

Basalt sees air quality change through the year. In short, a brief window in autumn tends to bring the year's best air, before winter inversions set in, whereas wildfire smoke drifting in from across the region is the main summer concern, while winter inversions can trap pollution locally. Higher-elevation, more exposed locations generally avoid the worst of the valley inversion episodes.

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.