PM2.5 algorithms

[dwhitemv (Doug White)]

EPA has spent a lot of time studying the Plantower conversion factors and how they apply to real-world PM2.5 measurements. You might start by reviewing the papers/presentations linked in the post below. The actual algorithms are proprietary to Plantower.

How to get EPA purple map data

All data on the PurpleAir map comes from PurpleAir sensors. For help accessing sensor data through the API, you can view our guide here: Making API Calls with the PurpleAir API. The documentation is available here: https://api.purpleair.com/. You can download data in both JSON and CSV format with the API.