Clean Water Starts Here...
Clean WaterStarts Here...

How it Works:

We have completed our testing for the 2021 season.

Please sign up for 2022 testing below. 


At Certified Testing Services of Clark County we eat, sleep, and breathe backflow testing so you don't have to. We know our customers have better things to do than worrying about their backflow testing. That's why we handle the entire process from beginning to end.


Our standard residential tests are $50.00. We offer Ridgefield customers a neighborhood discount of $40.00. For that price, we will test the device, generate the required test report, and send an official copy directly to your water supplier.  You will also receive a report copy for your records with your invoice for the year.


As an added convenience we will add your home to our priority routes for the following year. You will receive a courtesy email about a month before your test is due.


Schedule a Test:

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You will receive a WELCOME EMAIL within 1 Business Day confirming your submission and explaining our process.

P.O. Box 562
Ridgefield, WA



(360) 600-3273

WA. Contractors Lic. #:



Always Use a Licensed and Insured Contractor!

Company Information

Certified Testing Service Inc.

P.O. Box 562

Ridgefield, WA. 98642

BAT #: B6480

Contractors License #: CERTITC830F


Office:  (360) 600-3273

For support email us at


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