What I've heard is city water is safe, well water should be sterilized.
What I've done is used tons of water straight from the tap without boiling in all of my brews. (and I have city water).
Primary: Belgian Dubbel Braggot
On Deck: Sour-mash Belgian Strong
Bottled : Holy Matrimony Saison, Ghost Stout (extract), Blood Orange Hefeweisen, Oatmeal Stout, Willamette SMaSH lager, EdWort's Apfelwein, Scottish Export, Cascade SMaSH, Amarillo SMaSH, Ghost Stout (partial mash), EdWort's Apfelwein, Cranberry Wheat, Habanero American Ale, Belgian Christmas Ale