St. Louis County, MO

Backflow Assembly Tester Registration Form

St. Louis County is updating our current backflow database to allow for online submitting of annual backflow tests. We are asking all backflow testers and company administrators to create a unique email address that will be used for logging into the system to submit test reports and receive correspondence related to those reports.

Please direct questions to: 

Laurie Hogan: 314-615-7861

Patty Miller: 314-615-7271

Licensing and certification requirements are not changing. If you have questions regarding your license, please call Plumbing Licensing at 314-615-3741. 

Please note that each backflow tester and company administrator is required to have a unique email address in order to participate. The same email address cannot be used for multiple contacts.

Contact Information

A UNIQUE, individual email address is required for each person who registers.

Backflow Testing Company Information

Additional Users

Testers should only submit one form for themselves. Testing company administrators can add a total of 3 users per form.


We work with cities and water authorities across the globe that are looking to modernize their operations and future proof of their compliance programs against the changing regulatory landscape.

Please visit our website or contact your city representative for further information.