What is air quality in San Mateo?
|Air pollution level||Air quality index||Main pollutant|
|Good||40 US AQI||PM2.5|
Why is it smoky in San Mateo? The increasing incidence of wildfires in or near San Mateo County fueled by hotter summers due in part to climate change also negatively impact San Mateo air quality. Wildfires can cause a sudden and rapid rise in unhealthy particle pollution in San Mateo.
Does the Bay Area have good air quality? The Bay Area’s air quality is substantially better than a few decades ago, according to a Chronicle analysis of air pollution levels over two decades. But the increasingly large and frequent wildfires in the region have contributed to unhealthy air quality, especially in historically dry years, such as 2020.
Why is PM 2.5 so high? Because fine particles can be carried long distances from their source, events such as wildfires or volcanic eruptions can raise fine particle concentrations hundreds of miles from the event. PM2.5 is also produced by common indoor activities.