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List of Backflow Testers

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Search for OHA-certified Backflow Assembly Testers!

Only Oregon Health Authority (OHA) certified Testers can test assemblies in Oregon. Oregon Drinking Water Services (DWS) provides a  public list of OHA-certified Backflow Assembly Testers. 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. Keep in mind not all certified testers choose to be on this list.

Using the List


The list is organized by county. You can sort by Certification #, Name of Tester, Employer, City, and State. 

A backflow assembly test performed by an uncertified Tester is not valid and cannot be accepted by the serving water supply system. Contact DWS to report any test performed by an uncertified Tester.

Get on the list


First you must be a Certified Backflow Assembly Tester in Oregon. Second you have to have a license from the Construction Contractor's Board (CCB) or Landscape Contractor's Board (LCB). 

Customers should always verify the licensing of any contractor they hire contact:
CCB at 503-378-4621
LCB
at 503-967-6291

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