You're absolutely right that the AIs are going to have to step up and find ways to participate in this water sharing solution.
And by the way, it sounds like your (Cali) community is way, way ahead of regulations in this regard!
Not the same here yet. I've been watching a new neighbour dig a hole in their yard the size of a football field (I'm serious), evidently thinking it will magically fill with water. Seems many people envision mother earth as a big water balloon :)
Yes, we need to stop taking water for granted.