Backflow testing in Hesperia, CA

Certified backflow prevention assembly testers approved by Hesperia Water District. Annual testing is required — find a local pro today.

Now accepting listingsSan Bernardino County, CA

Agency-approved testers serving Hesperia

Every tester below is on a local water-agency approved list. Claimed & verified businesses appear first; the rest can be reached at their agency-published number.

AA
AAA Action Backflowon City of San Bernardino Municipal Water's approved list · Aug 2026

Hesperia, CA(909) 615-1800

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AB
Advanced Backflow & Leak Detectionon City of San Bernardino Municipal Water's approved list · Aug 2026

Hesperia, CA(909)544-1340

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Backflow testing requirements in Hesperia

Property owners in Hesperia served by Hesperia Water District are required to have their backflow prevention assemblies tested annually. If you've received a testing notice, a certified tester can complete the test and file your results directly with your water agency — keeping your property compliant with no paperwork on your end.

Hesperia zip codes served: 92340, 92344, 92345