Public List of Backflow Assembly Testers

The Department provides a current public list of DHS-certified Backflow Assembly Testers (pdf)    The public can use this list to select and contact a Tester that is currently certified and has indicated availability and appropriate licensing to test assemblies for compensation.  Only Oregon DHS-certified Testers can test assemblies in Oregon.

Certified public Backflow Assembly Testers on this list are required to obtain licensing through the Construction Contractor's Board (CCB) or Landscape Contractor's Board (LCB).  The Department does not verify CCB or LCB licensing for individuals on this list of public Testers.  Customers should always verify the licensing of any contractor they hire by using the above links or by calling:

Construction Contractor's Board at (503) 378-4621 or

Landscape Contractor's Board at (503) 986-6561.

Helpful List Information

The list is organized alphabetically by county name.  A county may not be listed if there are no certified public Backflow Assembly Testers listed in that county.  You may choose to look at a neighboring county for additional choices or contact any Tester to ask if they are willing to travel to your location.

Water suppliers may also use this list to offer their customers a choice of Backflow Assembly Testers or to verify if a Tester is currently certified when they receive a test report on an assembly in their water system.  Other non-public lists of Testers are available only to public water systems by contacting the Department.

Any test performed by an uncertified Backflow Assembly Tester is in violation of Oregon Administrative Rule 333-061-0072(1).  A test performed by an uncertified Tester is not valid and can not be accepted by the serving water supply system.  Contact the Department to report any test performed by an uncertified Tester.