Backflow Prevention

Cross Connection Control Program


Backflow Prevention Bulletin

Summer is right around the corner and that means many people will be watering their lawns either with a hose and nozzle or using an in-ground sprinkler system. 

Take time to learn how to protect your drinking water from getting contaminated from backflow--the undesirable reversal of water into your water supply--by reading the current Backflow Prevention Bulletin.

Cross Connection Control Program

The Cross Connection Control Program (CCCP) works hard to protect your drinking water from contamination by ensuring that all cross connections are protected. A cross connection is an actual or possible pathway between our drinking water supply and a source of contamination or pollution. In our homes and businesses, water is often used to dilute, mix, cool and clean. This water may come into contact with dangerous chemicals and substances. Cross connected plumbing may put your drinking water in contact with contaminated water.

Because of this, laws were enacted to protect the drinking water and require that cross connections be protected from backflow. The Safe Drinking Water Act, signed into law in 1974, placed the responsibility of local governments and water authorities for drinking water protection.

The CCCP surveys plumbing systems to identify cross connection hazards and determines if the correct backflow assembly is installed and maintained.

The city surveys commercial properties annually to ensure cross connection compliance and safe drinking water quality. The need for cross connection control exists in all types of premises, whether industrial or residential. Backflow prevention assemblies help protect the public safety by preventing potable water contamination in such critical areas as municipal water systems, food processing plants, medical and dental water supplies, and many industrial applications.

The city's CCCP mails out reminder letters annually to all businesses and homeowners that need to have their assemblies tested. This is a simple testing procedure performed by any State Certified Backflow Assembly Tester. Please refer to Quick Links below for a listing of local testers.
You can also verify a tester’s certification by name or certification number on the following website to ensure your tester is certified: Backflow Assembly Tester Certification Verification.

What is backflow?

Backflow is the undesirable reversal of the flow of water or mixtures of water and other undesirable substances from any source (such as used water, industrial fluids, gasses, or any substance other than the intended potable water) into the distribution pipes of the potable water system.

We are here to help you obtain the goal of having a safe connection to the City's water supply. You can contact the CCCP directly by email or phone at 425-556-2847.

Quick Links

FAQs About Backflow Preventers
Chemical Dispenser Protection Options Brochure
Is your Lawn Sprinkler System Protected?
Certified Backflow Assembly Testers
Backflow Tester Report Form
Standard Specifications & Details

Drinking Water Protection

Safe Drinking Water Act of 1974
Washington Administrative Code - Department of Health
Washington State Department of Health - Office of Drinking Water Rules
Redmond Municipal Code 13.10 - Cross Connection and Backflow Prevention
Redmond Water Quality Report - Consumer Confidence Report

Cross Connection Control Program

Public Works Department
Maintenance Operations Center
18080 NE 76th Street
Redmond, WA   98052

Contact CCCP