Backflow testing & repair in Fremont, CA
BackflowCare tests backflow prevention assemblies in Fremont (Alameda County) and files the results with Alameda County Water District. Customers use a certified backflow tester who is authorized and registered to work for ACWD customers; ACWD publishes the list of approved testers. If a device fails, we make minor repairs and file the passing retest with ACWD.
- County
- Alameda County
- Water supplier
- Alameda County Water District
- Annual test
- ACWD: owner hires a certified tester
- Our price
- $199 per device ($25 off for new customers), or from $180/year on a plan
- ZIP codes
- 94536, 94538, 94539, 94555
What ACWD requires in Fremont
- After a backflow device is installed, the law requires it to be tested by a certified tester at least once a year.
- Homes with a backup supply such as a private well or spring must have the proper backflow prevention device.
Source: ACWD backflow program (official page), checked October 17, 2026.
Rules for new and replacement devices in Fremont
- One of ACWD’s certified Cross Connection Specialists surveys the property and, if needed, asks the customer to install a backflow prevention device at the meter.
- ACWD publishes standard installation drawings that show the required type and location of devices.
Source: ACWD backflow program (official page).
Installing or replacing a device takes a licensed plumbing contractor, usually with a permit. We can refer you to one we trust, test the new device once it’s in, and make minor repairs to existing ones.
Backflow questions from Fremont property owners
Which water supplier serves Fremont?
Alameda County Water District supplies water in Fremont (ZIP 94536, 94538, 94539, 94555) and runs its backflow program.
Who tests backflow devices for ACWD customers in Fremont?
Customers use a certified backflow tester who is authorized and registered to work for ACWD customers; ACWD publishes the list of approved testers.