Air Quality Information

for the Sacramento Region

Wednesday, an upper-level trough of low pressure will move across northern California, enhancing the onshore flow. However, mostly sunny skies and temperatures in the upper-80s will aid ozone formation. Therefore, ozone levels will be Moderate. Thursday, as upper-level high pressure builds over northern California, mostly sunny skies and temperatures in the mid-90s will enhance the formation of ozone. However, moderate northerly winds during the afternoon hours will disperse some pollutants. Therefore, AQI levels will remain Moderate. Friday, upper-level high pressure will continue to build over northern California, limiting vertical mixing and producing sunny skies and very warm temperatures. These conditions will increase ground-level ozone production. In addition, light winds will limit the dispersion of pollutants. As a result, ozone levels will be high-Moderate.