In my experience with municipal utility districts, the reliability of the water supply is typically not much better than the local power grid. The sewage lift stations seem to have the highest quality generator arrangements.
Both of these services have been phenomenally reliable everywhere I’ve lived in the United States. The only exception was in a town where we’d get ice storms once a year that would bring trees down on top of power lines, but it was shocking how quickly a truck would show up and fix them all.
I can’t actually think of a time my water has stopped working anywhere except once when the road was torn up and pipes had to be replaced. I wasn’t home, we just got letters explaining when it would happen and how to flush the pipes when it was done.
Is this the norm for most places in the US?
Where I live our water/sewer bill averages out to a little over $100 a month.