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Backflow Assembly Tester

BAT Public List

View the BAT Public List

BATs are listed in only one county. Select a county from the list below to view BATs in that county.

Search BATs by last name.
View the complete BAT list for Washington State.

The Department of Health (DOH), Office of Drinking Water, has authorized Certification Services at Green River Community College to maintain a list of certified Backflow Assembly Testers (BAT) who may provide testing services to the public. Only certified BATs who have authorized disclosure of this information are listed. There is no implication of preference, nor does this list constitute endorsement by Green River Community College (GRCC) or DOH.

The BAT Public List is believed to be accurate and is updated frequently. However, GRCC and DOH assume no responsibility for errors in or for the use of the information provided. Persons or entities relying on any information obtained from the BAT Public List do so at their own risk.

This list is considered public information and may be distributed or copied. However, the list may not be used for commercial purposes. See Disclaimer. The search results below may be printed.

To be added to the BAT Public List, or to make a change to information already on the list, use the BAT Public List Authorization Form.