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San Jose irrigation backflow testing

San Jose Water repeatedly names irrigation systems as common cross-connections that can pull residential and commercial properties into the program.

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City: San Jose Utility: San Jose Water Cross-Connection Control and Backflow Program Cadence: At least annually Last verified: 2026-06-29
Local answer

What to check for San Jose

San Jose Water repeatedly names irrigation systems as common cross-connections that can pull residential and commercial properties into the program.

  • Due basis: San Jose Water says testing and recordkeeping are required on all backflow preventers at least once a year, and customers contacted by the Cross-Connection and Backflow Program are expected to act when a hazard survey identifies the need for protection.
  • Who is affected: Commercial and residential properties, fire services, irrigation systems, and other San Jose Water customers whose properties create actual or potential cross-connection hazards.
  • Program phone: 408-279-7872
Evidence-backed next step

Use the governing utility workflow

City search demand maps directly to San Jose Water's governing backflow program.

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Local signals

Signals that matter before you act

  • Irrigation systems are directly named as cross-connection hazards.
  • Hazard surveys drive whether protection is required on the service.
  • Annual testing and recordkeeping still apply once the assembly is required.
Workflow

San Jose workflow order

  1. Confirm the irrigation setup has been flagged by San Jose Water's hazard review.
  2. Install the approved assembly if required.
  3. Keep the irrigation backflow device on its annual testing cycle.