Do we need to treat the drinking water if carbon dioxide is naturally mixed with it?

We are living in a small town and getting drinking water from a well. Recently we increased the depth of well to 45 ft from 35 ft. We have started getting milky water since then. Our municipal officers says that the water we getting these days has carbon dioxide in it. My confusion is, people prefer to drink carbonated water so do you think the water we are receiving needs treatment? And if yes, how to get pure water from the well as the water we are getting is a natural water.