Backflow testing for City of Redwood City customers
Redwood City accepts backflow test results only from testers on its Qualified Tester List, hired by the customer. BackflowCare tests assemblies for City of Redwood City customers in Redwood City, and files the results the way City of Redwood City requires.
- Area
- San Mateo County
- Cities we serve
- Redwood City
- Annual test
- Owner hires a certified tester
- Filing results
- Routine tests and repairs are reported online through the City’s test entry portal.
- Deadline
- Test reports are due within 30 days of the City’s first notice; the customer must ask the City in writing for an extension.
- Our price
- $199 per device ($25 off for new customers)
- City of Redwood City contact
- crossconnection@redwoodcity.org
City of Redwood City testing rules
- All backflow assemblies (and wells) must be tested or inspected every year.
- A Redwood City backflow tag must be fixed to each assembly that passes its test.
Source: City of Redwood City Water backflow program (official page), checked October 19, 2026.
City of Redwood City rules for new and replacement devices
- Newly installed assemblies are reported on the City’s paper test form within 15 days.
Source: City of Redwood City Water backflow program (official page).
City of Redwood City backflow questions
Who tests backflow devices for City of Redwood City customers?
Redwood City accepts backflow test results only from testers on its Qualified Tester List, hired by the customer.
Which cities does City of Redwood City serve?
We serve City of Redwood City customers in Redwood City.
How are backflow test results filed with City of Redwood City?
Routine tests and repairs are reported online through the City’s test entry portal.
When is the City of Redwood City backflow test due?
Test reports are due within 30 days of the City’s first notice; the customer must ask the City in writing for an extension.