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Backflow Prevention Permission for use from the University of Southern California does not allow web posting of the documents below. Limited distribution of hard copies is allowed only to regulated entities and consultants working in Washington State. However, you can order the publications through our on-line catalog links below.
Backflow Incident Report Form #331-243 (188 KB Word) - Cross-Connection Control Program Has your water system ever had a backflow incident? Backflow is when water flows in the opposite direction than intended. Under backflow conditions, contaminants may enter the drinking water supply through unprotected cross-connections. Sometimes the contaminant is confined to the customer’s plumbing system. Other times the contaminant may enter the distribution system. Washington State Drinking Water rules [WAC 246-290-490(8)] require water purveyors to document details of backflow incidents using the above form. To complete the backflow incident form, you can either:
Please send the signed, completed form to: Washington State
Department of Health
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Publications More publications are available through our on-line publication catalog External Links Washington Certification Services Web Site Backflow Assembly Tester (BAT) Information
BAT Public Listing Foundation for Cross-Connection Control and Hydraulic Research
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