What is a cross connection?

A cross connection happens when the utility’s drinking water supply connects to another water source or anything that could contaminate it. These connections are not allowed because they can make drinking water unsafe.

Common examples of cross connections

• Connecting utility water to a private well
• Connecting to any other water source
• Improperly connected fire sprinkler systems
• Certain types of irrigation systems
• Air conditioning systems that send water back into the supply

Important rules

• You cannot have both utility water and well water on your property at the same time
• If you had a well, it must be permanently disconnected before utility service can begin
• The utility may deny or disconnect your service to prevent cross connections

Backflow prevention devices

Some water systems require special devices called backflow preventers to protect the water supply. If you are required to have one, you will pay an annual fee of $25 to maintain it.

The utility runs a Cross Connection Control Program to find potential risks and require protective devices when needed. This protects everyone’s water supply from contamination.

Tariff Reference: Section W-002 (Definitions - CROSS CONNECTION), Section W-017, Section W-022-Q, Section W-022-S, Section W-027.13