https://www.openstreetmap.org/node/8734982804

Is there drinking water available here or not? It can be water fountain, water tap, maybe even hand pump, spring and so on.

It is marked as 

amenity = drinking_water
disused:amenity = drinking_water

so it is marked as both active and disused at the same time.

If it is closed during winter then seasonal=yes would be much better