As others have mentioned, if you are connected to a Public Water Supply which it sounds like you are, there will be a Consumer Confidence Report which will provide information on the constituents of the water.

Likely why the town officials were cagy on the safety of the water is that they don't know. They aren't the scientists or public health officials making the guidelines and understanding of what those things do to people. They don't want to give wrong info and given that they don't know they will likely give very little info.