Backflow testing for Daly City Water customers
Daly City’s backflow testing falls under San Mateo County Environmental Health’s cross-connection control program. BackflowCare tests assemblies for Daly City Water customers in Daly City, and files the results with Daly City Water.
- Area
- San Mateo County
- Cities we serve
- Daly City
- Annual test
- Owner hires a certified tester
- Deadline
- The tester sends the test report to County Environmental Health within 10 calendar days.
- Daly City Water fee
- Late testing can bring administrative fines of up to $500 per day, per assembly.
- Our price
- $199 per device ($25 off for new customers)
Daly City Water testing rules
- 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.
Source: San Mateo County Environmental Health cross-connection program (official page), checked October 19, 2026.
Daly City Water backflow questions
Who tests backflow devices for Daly City Water customers?
Daly City’s backflow testing falls under San Mateo County Environmental Health’s cross-connection control program.
Which cities does Daly City Water serve?
We serve Daly City Water customers in Daly City.
When is the Daly City Water backflow test due?
The tester sends the test report to County Environmental Health within 10 calendar days.
Does Daly City Water charge a backflow fee?
Late testing can bring administrative fines of up to $500 per day, per assembly. It is separate from our $199 test price.