Backflow Prevention Information

Backflow Prevention Requirements

Backflow occurs when water or other substances flow in the opposite direction than intended allowing contaminants to enter the public water system or consumer’s plumbing. For detailed information, please visit WA Department of Health

Residential:


  • All underground lawn sprinkler systems are required to have a backflow prevention assembly installed to reduce the risk of contaminating public drinking water. 
  • Installation of a lawn sprinkler system requires a plumbing permit issued by the City of Camas
  • Remember: have your irrigation system's backflow device tested annually! All testing is the responsibility of the property owner.

Non-Residential:


  • All non-residential water services must have a backflow prevention assembly installed at the water meter and where required by the City of Camas.
  • Annual testing is the responsibility of the property owner.

Failure to comply with irrigation regulations may result in severing the connection to the backflow assembly or discontinuation of City water service.

​Select this link for assistance in identifying types of backflow prevention. Annual testing is required on certain backflow prevention devices as per the Washington State Department of Health. A list of State Certified Backflow Testers is available on-line. For more information you can contact the City of Camas at (360) 817-1569. Annual reminder notices are sent by the Public Works Department and test results must be returned to the City (WAC 246-290-490).

Many irrigation systems could be more efficient by sizing and adjusting the heads properly so they are watering what you want instead of the sidewalks and streets. Drip systems are best for shrub areas and conserve more water. If changes to your landscaping have been made, make sure your sprinkler system has been changed also. Systems operated by timers can take advantage of early morning watering which helps reduce peak hour usage and is better for lawns and shrubs. Check timers periodically to make sure they are set correctly, as they can become out of adjustment with power interruptions. Professional landscapers and irrigation contractors can provide ways to landscape, maintain, and install systems to conserve the most water.  Backflow and Irrigation Tips