It depends on your town. Where town water is available in my area hooking up is also optional. I know folks who use a well for irrigation and the town water for the house.
If the town decided to put in public water on my street I'd be renting an excavator and digging a trench to the street as fast as I could! My well water is pretty poor though, 12+ ppm iron, 2 gpm recovery. My personal water treatment plant works well, but I wouldn't miss it either