Local Government OfficeThornton City Utilities 5.0 (1)SaveAddress12450 Washington St, Thornton, CO 80241Phone(303) 538-7370Websitehttps://www.thorntonco.gov/city-services/utility-billing HoursMonday: 7:00 AM – 4:00 PMTuesday: 7:00 AM – 4:00 PMWednesday: 7:00 AM – 4:00 PMThursday: 7:00 AM – 4:00 PMFriday: 7:00 AM – 4:00 PMSaturday: ClosedSunday: Closed← Back home