Backflow testing for EBMUD customers
The property owner hires a certified tester, and the test must be performed by a tester on EBMUD’s approved backflow testers list. BackflowCare tests assemblies for EBMUD customers in Oakland, San Leandro, Castro Valley and Walnut Creek, and files the results the way EBMUD requires.
- Area
- Alameda and Contra Costa counties
- Cities we serve
- Oakland, San Leandro, Castro Valley, Walnut Creek, Danville, Alamo, San Ramon
- Annual test
- Owner hires a certified tester
- Filing results
- The completed test form is due by mail within 30 days of EBMUD’s notification.
- Our price
- $199 per device ($25 off for new customers)
- EBMUD contact
- EBMUD Backflow Section, 510-287-0874
EBMUD testing rules
- Testers must be certified as a General Backflow Tester by AWWA, ABPA, NCBPA or ASSE and also pass an EBMUD exam.
- Since July 1, 2025, customers with a private well must test annually and submit the results (EBMUD Regulations, Section 26).
Source: East Bay Municipal Utility District backflow program (official page), checked October 17, 2026.
EBMUD rules for new and replacement devices
- The customer must install, test and maintain the required device and pays all of its costs.
Source: East Bay Municipal Utility District backflow program (official page).
EBMUD backflow questions
Who tests backflow devices for EBMUD customers?
The property owner hires a certified tester, and the test must be performed by a tester on EBMUD’s approved backflow testers list.
Which cities does EBMUD serve?
We serve EBMUD customers in Oakland, San Leandro, Castro Valley, Walnut Creek, Danville, Alamo and San Ramon.
How are backflow test results filed with EBMUD?
The completed test form is due by mail within 30 days of EBMUD’s notification.