Air Quality Data - Unedited Hourly Concentrations

Use the form below to retrieve hourly air quality concentrations recorded from currently active ozone and particle (particulate matter 2.5) pollution monitoring stations across the State. This is "raw" data which has not been converted to the Air Quality Index and is "preliminary." To view past data from all sites please go to Historical Data and either select the QA'd Excel file for data from previous years or view the preliminary Excel file for data from the current year. The preliminary file is updated monthly.