Data that appears in the graph on the PurpleAir map can be downloaded. Learn more here: Download Map Graph Data.
An API is a tool that allows you to access data through code. The PurpleAir API gives you access to real-time or historical data from any time. API keys are needed to use the API. You can learn more about creating API keys, using the API dashboard, and making API calls from these articles:
The PurpleAir Data Download Tool allows users to download PurpleAir data from any time period and does not require any programming experience. Learn more here: PurpleAir Data Download Tool.
This tool uses the PurpleAir API, and API keys are required to use it. Learn to create API keys here: Creating API Keys.