Under the city’s constitutional home rule authority and K.S.A. 65-163a, the city, by its Utility Superintendent, may refuse to deliver water through pipes and mains to any premises where a condition exists that might lead to the contamination of the public water supply system and it may continue to refuse the delivery of water to the premises until that condition is remedied. In addition, the City Utility Superintendent may terminate water service to any property where the cross-connections or backsiphonage condition creates, in the judgment of the Superintendent, an emergency danger of contamination to the public water supply.