Air Quality Status in Pima County

Air quality has improved significantly in Pima County over the past two decades. This is due primarily to lower emissions resulting from federally mandated stationary source and motor vehicle emission standards; increased fuel economy and vehicle emission technology improvements, and … Read more

Ozone season in full swing

Ozone season is in full swing, and local air quality experts are tracking differences in ozone and other pollution levels due to social distancing measures and telework practices in place because of the COVID-19 pandemic. Ozone season runs from April … Read more