Went through this a month ago - just call, do not bother going to the office. If you go in person, you need a copy of your lease and two forms of identifications. If you call, you hopefully get the sweet angel I did who will try to set you up to get your water turned on the same day.

Thennn you can anxiously wait all day the day before the city closes for some Holiday only to have some guy call you at 10PM asking if you still need your water turned on, which, to his credit he did show up like 5 minutes later and turn my water on.