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The following words and phrases used in this chapter shall have the following meanings, unless a different meaning clearly appears from the context:
BACKFLOW: The flow, in the opposite direction from that intended, of any foreign substance which may enter the water supply system or of any contaminated or polluted water.
BACKFLOW PREVENTION DEVICE: An approved device which counteracts back pressure and/or prevents back siphonage. A reduced pressure principle backflow prevention device, a double check valve assembly, a pressure or atmospheric vacuum breaker shall be considered approved if it has successfully passed the performance tests of the University Of Southern California engineering center, or other testing laboratories acceptable to the city and the state of Idaho department of environmental quality.
CITY: The city of Blackfoot, or any authorized agent thereof.
CONTAMINATION: The infiltration of either solids, liquids or gases into the water supply system which does constitute public health hazard.
CROSS CONNECTION: Any physical arrangement whereby the water supply system is connected either directly or indirectly with any unapproved water supply, sewer, drain, conduit, pool, storage reservoir, plumbing fixture or other device which contains or may contain any substance capable of pollution or contamination.
CUSTOMER: Any persons and/or premises receiving water from the city water supply system.
POLLUTION: The infiltration of either solids, liquids or gases into the water supply system which, although not constituting a public health hazard, does impair the water quality with respect to taste, odor, color or turbidity.
WATER SUPPLY SYSTEM: The potable water supply system provided by the city. (2003 Code § 9-03-02)