According to leaked documents tesla actually uses less water than they are allowed to ~450, 000 m^3 vs 1,300,000 m^3. And in the same region there is an asparagus farm that uses double the amount of water that tesla uses.

Source (German) https://www.morgenpost.de/berlin/article241833924/Wasserverbrauch-Produktion-Tesla-Interna-veroeffentlicht.html

And no, people don’t have to ration their tap water because of tesla