We are lucky in that the town *did* run water lines out our way, back in the days when no one thought badly of septic systems. Our town water is really good, for all that it gets pulled out of a big river (but one without a lot of commercial boat traffic.)

We actually found a well on the property -- uncovered!!!! -- when we had some brush cleared a few years back. No doubt it was the water source, before the water lines went in. Downhill from the septic system, so there's no way we'd ever use it. There's now a big makeshift cover on the darn thing, and we've notified all the neighbors that we have a kid-unfriendly hazard on the property.