Annual city route

Modesto annual backflow testing

Modesto keeps protected assemblies inside the city's certified-tester workflow.

City: Modesto Utility: City of Modesto Cross-Connection and Backflow Control Program Cadence: Upon installation and at least annually thereafter for protected assemblies Last verified: 2026-06-29
Local answer

What to check for Modesto

Modesto keeps protected assemblies inside the city's certified-tester workflow.

  • Due basis: Modesto runs a utility-side cross-connection program and exposes a certified tester list from the official page.
  • Who is affected: Modesto services with irrigation, commercial, industrial, or other cross-connection risk.
  • Program phone: 209-342-2246
Local signals

Signals that matter before you act

  • The city exposes a certified tester list.
  • The program is framed around drinking-water protection.
  • Protected services should stay on the city workflow.
Workflow

Modesto workflow order

  1. Confirm the service is inside Modesto's program.
  2. Choose a tester from the city path.
  3. Complete the annual or post-install certification.