City of Oak Harbor, Whidbey Island, Washington, Whidbey Island's Premier Waterfront Community

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865 SE Barrington Drive
Oak Harbor, WA 98277
Phone: 360-279-4500
Fax: 360-279-4507

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Oak Harbor Cross Connection Control Program

The City of Oak Harbor Water Division has provided these documents to help you better understand the backflow procedures and requirements.  In addition,  as part of our on-going efforts to ensure the safety of your drinking water, we are required to protect our sytem against cross-connections.  Cross-connections can make our drinking water unsafe.  We have included a questionnaire to help determine if you have any special plumbing or activities that pose an increased risk of contamination to our water system.  Please take the time to fill out our questionnaire and return it to City Hall.  Thank you.

Commercial Questionnaire (PDF)

Residential Questionnaire (PDF)

Approved Backflow Tester List

Backflow Test Report Form Revised.doc

Backflow Installation Specifications

Double Check Valve Installation Specification

CCC Health Hazards

CCC House Hazards

CCC Irrigation Hazards

Reduced Pressure Backflow Installation Specification

Thermo Expansion Brochure

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