No more personal wells are allowed. The existing ones are grandfathered in (that beautiful invention to keep the elites of the past in power: "grandfathering").
You basically own the land on paper for the privilege of paying taxes but the government reserves fundamental legal rights to what you can do with land you own.
Laws against collecting rainwater are actually pretty common.
Yes, land ownership is pretty much an illusion.
Unless an aquifer is entirely inside your land, it makes plenty of sense not to let you make a well.