Backflow testing & repair in Brisbane, CA
BackflowCare tests backflow prevention assemblies in Brisbane (San Mateo County) and files the results with City of Brisbane / Guadalupe Valley Municipal Improvement District. Brisbane’s backflow testing falls under San Mateo County Environmental Health’s cross-connection control program. If a device fails, we make minor repairs and file the passing retest with City of Brisbane.
- County
- San Mateo County
- Water supplier
- City of Brisbane / Guadalupe Valley Municipal Improvement District
- Annual test
- City of Brisbane: owner hires a certified tester
- Our price
- $199 per device ($25 off for new customers), or from $180/year on a plan
- ZIP codes
- 94005
What City of Brisbane requires in Brisbane
- In the San Mateo County program, only a County-certified backflow tester may test assemblies.
- Assemblies must be tested at least once a year, and again after installation or repair.
- The tester sends the test report to County Environmental Health within 10 calendar days.
- Late testing can bring administrative fines of up to $500 per day, per assembly.
Source: San Mateo County Environmental Health cross-connection program (official page), checked October 19, 2026.
Backflow questions from Brisbane property owners
Which water supplier serves Brisbane?
City of Brisbane / Guadalupe Valley Municipal Improvement District supplies water in Brisbane (ZIP 94005) and runs its backflow program.
Who tests backflow devices for City of Brisbane customers in Brisbane?
Brisbane’s backflow testing falls under San Mateo County Environmental Health’s cross-connection control program.
When is the backflow test due in Brisbane?
The tester sends the test report to County Environmental Health within 10 calendar days.
Does City of Brisbane charge its own fee in Brisbane?
Yes. Late testing can bring administrative fines of up to $500 per day, per assembly. That fee is separate from our $199 test price.