Some of us grew up on well water. It's generally fine, although you need to inspect and treat it regularly, and if one of your neighbors really messes up his well, it can affect the whole water table around him too. My digestive track always gets a little messed up when I visit my parents back home (although this could also be from the water being treated for hardness). If you were really interested in non-municipal…
You need to inspect it (the CDC recommends annually sending away for a water test[1]), but I'm aware of no EPA or CDC recommendation that calls for unconditionally treating the water. You treat well water only if the tests find a problem.
[1] http://www.cdc.gov/healthywater/drinking/private/wells/testi...
https://www.cdc.gov/healthywater/drinking/private/wells/trea...