We have a farm in Medak and we were digging for water a few months back. Apparently there is a legal notification that you have to take permits to dig borewells anywhere in the state, but it is not followed.
Though the mandal offices, water boards, geology departments have their rules, there is a common sense practice which is used by all villagers. The practice usually is to notify all your neighbours who own land adjoining your property and ask them to come to the drill site along with senior folks in the village. If any objections are there, like drilling within a certain distance, and anyone objects, they can stop the drilling right there.
That is what I call as proper enforcement. Farmers do realize the effect of improper drilling and will not allow indiscriminate drilling. So it is best to contact the farmers in your neighbourhood and they will let you know the proper process.