If you are a water customer that had your backflow prevention assembly device tested but you've received an overdue notice, please visit the BSI Tracking website and use your CCN to verify whether your test results have been submitted. If you are still showing as non-compliant, you'll want to contact your testing company to have them submit your test results. Test results can only be submitted online via the BSI website by certified backflow prevention assembly testers.

League City residents are responsible for meeting the annual test requirement for backflow prevention devices. Backflow testing is the owner’s responsibility and is paid for by the owner. Additionally, owners are required to pay a one-time registration fee of $35 for each backflow device.

All repairs, replacements, or overhaul assemblies must also be performed by licensed backflow prevention assembly tester and permitted by the City. View an up-to-date list of companies and testers (PDF).