• Our Cross Connection Control Program protects the public water supply by making sure that:

  • Properties with potential or actual cross connections are properly maintained

  • Backflow prevention devices are installed, tested, and documented regularly

What is Cross Connection?

A cross connection happens when a drinking water supply is connected — directly or indirectly — to a non-potable water source. Examples include:

• Irrigation systems

• Boilers

• Fire sprinkler systems

• Chemical feed equipment

• Industrial water systems

If pressure changes occur in the system, water can flow backward (backflow) and allow contaminants to enter the public water supply. This can pose serious public health risks.

📜 State Requirements

The Cross Connection Control Policy Handbook (CCCPH) was adopted by the California State Water Resources Control Board in December 2023 and became effective July 1, 2024.

The Vernon Public Utilities Water Department adopted its Cross Connection Control Plan on July 1, 2025, implementing the requirements locally and providing guidance for property owners and businesses within the city.

Under the CCCPH and the Vernon plan, every public water system, including our agency, must implement a cross connection control program that includes:

• Hazard assessments of properties

• Ordinances or rules requiring backflow prevention

• Installation, testing, inspection, and maintenance of backflow prevention devices

• Recordkeeping and documentation

• Enforcement authority, including the ability to suspend water service if compliance is not met

🏢 What You Need to Know

If your property has potential or actual cross connections:

• You may be required to install a backflow prevention assembly

• The assembly must meet recognized standards and be installed at or near your water service connection or meter

• Once installed, the device must be tested annually, maintained, and documented according to program requirements

• Owners and operators are responsible for ensuring ongoing protection, including:

  • Testing

  • Repairs

  • Recordkeeping

  • Compliance with notices

Click on the Image Below for information on Backflow Prevention Assemblies