From The Denver Post:
Residents can pick any three days to water but no more than that. Also, watering is not permitted from 10 a.m. to 6 p.m. because that is the part of day when water tends to evaporate more.
Aurora Water officials are encouraging people to get out their hoses and sprinklers, as more trees and lawns are dying this year because of the lack of moisture this winter.
More Aurora coverage here.