Neb. Rev. Stat. § 16-667

A city of the first class may, by ordinance, lay off the city into suitable districts for the purpose of establishing one or more systems of sewerage, drainage, or water service; provide such sewerage, drainage, and water systems and regulate the construction, repair, and use of such systems; compel all proper connections therewith and branches from other streets, avenues, and alleys, and from private property; and provide a penalty not to exceed one hundred dollars for any obstruction or injury to any sewer, drain, or water main or part thereof, or for failure to comply with the regulations therefor prescribed.