The ambient background concentration data collected from these District monitoring sites, as well as, other non-District monitoring stations can be found on EPA’s website here. District produced NO2 and Ozone data sets can be downloaded from the District’s FTP server using the links below.
NO2 Hourly Data
NO2 3 Year Max Data
Ozone Hourly Data
Ozone 5 Year Max Data
For information about each of these monitoring sites please refer to ARB's Quality Assurance Air Monitoring Site Information.
