How to Become an Approved Tester

We only accept backflow test results from testers who are on our Approved Tester List.

How to become a CWS Approved Backflow Tester



  1. Complete SCDHEC certification.
  2. Attend a Charleston Water System orientation session. Contact us for more info.
  3. Follow our policies and procedures as outlined in our Cross Connection Control Program Manual.
  4. Tester recertification is required every three years ($80 fee.)

Upcoming Backflow Tester Orientations -
Held at our main office, 103 St. Philip Street, Charleston, SC 29403.
Register: backflow@charlestoncpw.com

Postponed at this time due to COVID-19. We will update this site with more information as it comes. If you have any questions, please send an email to backflow@charlestoncpw.com.

    Tester Recertification


    To remain on our List of Approved Backflow Testers, you must complete recertification every three years.

    Charleston Water System is an SCDHEC backflow recertification site, and we hold recertification tests quarterly. The fee is $80.

    Backflow Tester Recertification Tests


    Tests are held at our main office, 103 St. Philip Street, Charleston, SC 29403. To register, send an email to backflow@charlestoncpw.com.

    Postponed at this time due to COVID-19. We will update this site with more information as it comes. If you have any questions, please send an email to backflow@charlestoncpw.com.