That's because you live 3 hours north of me, sitting on top of the same stupid geological formation.
And on top of that are large deposits of ground up rock from the last glacial period. Milford is surrounded by gravel pits, and the 114 ft deep town wells are in that gravel. The sand in the area used to be sandstone, and of course the binder in sandstone is calcium carbonate. Lots of iron in the water here too, as that came along from the ride from Up North.
One town to the east, and the water would come from Lake Huron, and be much better.