A. When Oro Valley Water Utility determines that the water supplied by the public water system may be subject to contamination or pollution, a backflow prevention method shall be required at every service connection to a customer’s water system. The customer shall install the required backflow protection within the time specified by the Utility. In determining the time in which backflow protection shall be installed, the Utility shall consider the degree of hazard potential to the public water supplies.

B. The backflow prevention method required shall be determined by the Utility. The method required by the Utility shall be sufficient to protect against the hazard potential, as determined by the Utility, to the public potable water supply.

C. Residential service connections will be exempt from backflow prevention unless it is determined by the Utility that the potable water supplied by the public potable water system may be subject to contamination, pollution or other deterioration of quality by conditions or potential conditions within the customer’s water system. ((O)07-21, 03/21/2007; (O)98-03, 01/07/1998. Formerly 15-23-2)