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Backflow Testing and Cross Connections

This page is intended to help you understand our cross connection Control Program

In 1996 the Clean Drinking Water Act initiated laws for Cross Connections. The State of Idaho code for Cross Connection requires that all homeowners and businesses have testable backflow devices on sprinkler systems and that all outside hose bibs are anti-siphon. In 2003, EEWA Board of Directors was authorized by the members to manage the annual backflow testing for backflow prevention assemblies connected to the water system. EEWA requires that all homeowners fill out the compliance survey and have their devices tested annually.

How do I comply with the State code?

Backflow Testing will begin on or around May 1st; a satisfactory test must be submitted annually by June 30th. Homeowners will receive their results with their next bill, unless their device fails, at which time they will be notified immediately.  Feel free to turn on your irrigation and use it until your test has been completed. The cost for the annual backflow test is $35.00 and your account will be billed. 

The EEWA Certified Backflow Tester is: Environmental Systems Operations, LLC 208-691-3428

For details on the backflow testing process please refer to this Backflow Brochure.

Cross Connection and Backflow Devices

Any physical arrangement whereby a public water system is connected, directly or indirectly, with any other non-potable water system, sprinkler, sewer, drain, conduit, pool, storage reservoir, plumbing fixture, or other device which contains, or may contain, contaminated water, sewage, or other waste liquid of unknown or unsafe quality which may be capable of imparting contamination to the public water system as a result of backflow.  Bypass arrangements, jumper connections, removable sections, swivel or change-over devices, or other temporary or permanent devices through which, or because of which, backflow may occur are considered to be cross connections. Example Devices

State of Idaho Cross Connection Requirements


Department of Environmental Quality Public Drinking Water systems


A)An inspection once a year of all facilities listed in subsection 900.02 (Table 2) to  locate cross connections and determine required suitable protection.


B)Required installation and operation of adequate backflow prevention devices.  A list of minimum recommended devices for various facilities is provided in sub section 900.02 (Table 2).


C)Annual inspections by American water Works Association-certified tester, or equal, of all installed backflow prevention devices to insure operability.


D)Discontinuance of service to any facility where suitable backflow protection has not been provided for a cross connection.


E)If double check valves and/or reduced pressure principle backflow prevention       devices are used, they must pass a performance test conducted by the University of Southern California Foundation for Cross Connection Control and Hydraulic        Research or meet American Water Works Association C-510 or C-511 standard or another equal test approved by the Department.


F)If atmospheric vacuum breakers and pressure vacuum breakers are used, they shall be marked approved by the International Association of Plumbing and Mechanical Officials (IAPMO) or by the American Society of Sanitation Engineers (ASSE).


G)Resilient seated shutoff valves shall be used after the effective date of these rules when double check valves, reduced pressure backflow prevention devices, and    pressure vacuum breakers are installed.

Idaho Cross Connect Code
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