Backflow Prevention Program

A cross-connection is any actual or potential link between a drinking water system and a source that contains non-drinkable (non-potable) water. These connections can be temporary or permanent, and they pose a serious risk of contaminating the public water supply.

Common Examples of Cross-Connections:

Private Wells: If a private well is connected to a water line that also receives water from the public supply, untreated well water can be forced into the public system, especially during pressure drops.

Lawn Irrigation Systems: Water left sitting in sprinkler lines can become stagnant and contaminated. If not properly protected, this water could be drawn back into your home's drinking water supply.

A backflow preventer is a device that stops water from flowing in the wrong direction. Its job is to keep contaminated water from entering the clean drinking water system.

There are two main ways to prevent backflow:

Air gaps: A simple method where there's a space between the water source and where it could be contaminated, so there's no direct connection.

Mechanical backflow preventers: Special valves or assemblies that create a physical barrier to stop water from reversing flow.
These devices help protect our health by keeping drinking water safe and clean.

Backflow prevention devices help keep our drinking water safe, but over time their parts such as seals, springs, and valves can wear out, become dirty, or stop working properly.

Even air gaps and other mechanical devices can sometimes be bypassed or fail. That is why regular testing is important. It ensures each device is still working properly and protects the water supply.

Certified professionals use specially calibrated equipment to test the devices and confirm they are functioning as intended.

CCW requires all backflow assemblies to be tested upon installation, repair, replacement, or relocation. Assemblies installed on high health hazards must be tested annually by a certified backflow prevention assembly tester. 

Texas Commission of Environmental Quality (TCEQ) requires residences or facilities that utilize auxiliary water supplies, such as a private well, install an RP at the meter or provide an air gap at the meter. Periodic CSIs are required to make sure the well system is not cross connected into the potable water system. 

All irrigation systems must be equipped with a pressure vacuum breaker to protect against water contamination. A licensed backflow prevention assembly tester is required to perform inspections upon installation, repair, replacement, or relocation.

For systems identified as potential health hazards such as those with chemical additives or located on properties with septic systems, a reduced pressure assembly is required and must be tested annually.