Unrelated to API, but still important question

Where can I get air quality data from pre 2016 from stations? It is clear that some of these stations have been set up for a long time, but for some reason the API has decided not to share it with us. I appreciate if you point me to the right direction.

Start by examining the API's station data coverage and the source records for dates before 2016. The issue does not name files, tests, or an implementation target; done would require identifying where that historical data can be obtained or defining a concrete change to expose it.

Written by the indexing model from the issue text.