New website coming soon!

Many website services are offline until Monday,11/27 when the new webpages will be activated. Registration and scheduling for any BAT practical exam is unavailable until then.

Please contact us on 11/27 if you need any assistance with a website feature. We will email detailed instructions on making your annual renewal fee payment the week of Monday 11/27 when the payment window opens to the email we have on file for BAT and Waterworks Certified Operators.

Hire a BAT List Authorization Form

The Washington State Department of Health, Office of Drinking Water has authorized Green River College to maintain a public list of Backflow Assembly Testers.

I authorize Washington Certification Services at Green River College to publish my name and contact phone number on a public listing of Backflow Assembly Testers certified in Washington.

Add my name to the Hire a BAT List.
Change my existing information on the Hire a BAT List.

Required Information

* Required

Verification of Address on File at Washington Certification Services
Please note that your address will NOT be published on the Hire a BAT List. Verification of home mailing address is for identification information only:

This listing is restricted to ONE county selection. Please select your choice from the list below.