Backflow Assembly Testers

What's New

Effective 1/1/13 water purveyors must only accept test reports from certified BATs examined under 10th Edition field test procedures. View list of BATs NOT ELIGIBLE to submit test reports.

Washington Certification Services at Green River Community College in Auburn administers the State of Washington’s Backflow Assembly Tester (BAT) certification program and examinations based on regulations, policies, and procedures established by Washington State Department of Health (DOH) in cooperation with the Waterworks Operator Certification Advisory Committee.

DOH is responsible for oversight of the BAT certification program and for enforcement activities.

Use the following links to find out more about the BAT certification program in Washington.