What is a cross-connection?

Cross-connections are the links through which it is possible for contaminating materials to enter a potable water supply. The contaminant enters the potable water system when the pressure of the polluted source exceeds the pressure of the potable source. The action may be called back siphonage or backflow.

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1. Why did I receive a notice from Ventura County Environmental Health Division?
2. My property recently went through a change of ownership, who do I contact to update owner information for my backflow device?
3. Can I view testing records for my backflow device?
4. Who can test the backflow assembly? Where can I get a list of certified testers?
5. What is a cross-connection?
6. What is the legal basis for a local cross connection control program?
7. What is backflow?
8. Why is backflow protection necessary?
9. What is a backflow assembly?
10. What happens if I do not comply with Ventura Water’s backflow & cross-connection requirements?