You can easily download historical data from PurpleAir sensors in CSV format. Access the “Sensor data download tool” page by one of the following methods:
- After selecting an area of interest within the PurpleAir map, click the Download Data button (downward facing arrow) in the bottom-left corner. This will open the “Sensor data download tool” page for all sensors within the map view you’ve chosen.
- Click on a sensor on the PurpleAir map, then hover the mouse cursor over the “Get this widget” link. A “Download Data” link will then be displayed for that individual sensor.
If your desired sensor no longer appears active on the map, consider increasing the “Reporting or modified within” field selection.
Once on the “Sensor data download tool” page, enter the desired date range in the Start Date and End Date fields. Select the checkboxes on the left side for the data channels you’d like to download (Channels A and/or B). Now either click Download Selected, or use the individual buttons on the right side to download only Primary or Secondary data for these channels.
For more information on the “Sensor data download tool” page and the data included in each channel, view the topic “Download Data with the Sensor Data Download Tool.”
We recommend the use of the Google Chrome browser to download data.