Annual Testing

ANNUAL BACKFLOW PREVENTION ASSEMBLY TESTING 

  1. All tests are due to the District by May 31st to avoid fines and potential termination of service. Annual testing for the compliance period shall begin January 1st and end May 31st each calendar year.  
  2. All backflow prevention assemblies will be tested upon installation, repair, or relocation and annually by a certified Backflow Assembly Tester (BAT).  

A BAT, holding a valid Washington State BAT certification is required to complete all testing of backflow prevention assemblies.

CERTIFIED BACKFLOW TESTERS 

Cross Valley no longer maintains a courtesy list of Certified Testers. 

The Department of Health Office of Drinking Water has authorized Washington Certification Services at Green River College to maintain a list of certified Backflow Assembly Testers.