Modesto backflow prevention requirements
Start with the utility page to confirm who is affected, accepted submission methods, phone contact, and source evidence.
City backflow route
Modesto backflow testing routes through City of Modesto Cross-Connection and Backflow Control Program.
City search demand maps directly to Modesto's governing cross-connection and backflow program. This page keeps the city search term visible while routing the actual compliance work to the governing utility record.
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
Next action
Pick the Modesto backflow path that matches the problem
The city term helps discovery. The governing utility still decides the rule, submission method, tester route, and follow-up order.
Modesto annual backflow testing
Upon installation and at least annually thereafter for protected assemblies Modesto runs a utility-side cross-connection program and exposes a certified tester list from the official page.
Modesto approved backflow testers
This utility has an official tester-list route. Confirm status on the governing list before treating a provider as approved.
Modesto failed backflow test
Use the failed-test page when the assembly has already failed and the next step is repair, retest, and report submission.
Modesto irrigation backflow testing
Use this path when the question is tied to sprinkler systems, reclaimed water, outdoor service, or irrigation assemblies.
Modesto fire-line backflow testing
Use this path when the assembly serves fire protection equipment or a managed commercial site.
Why Modesto maps to City of Modesto Cross-Connection and Backflow Control Program
City search demand maps directly to Modesto's governing cross-connection and backflow program.
- Modesto services with irrigation, commercial, industrial, or other cross-connection risk.
- Missing the city-recognized tester path can leave the assembly outside Modesto's accepted compliance workflow.
- Program phone: 209-342-2246
- City route reviewed: 2026-04-05
Source-backed workflow
Modesto is a useful California city because the official utility page exposes the program and a certified tester list.
Provider layer
Public provider profiles mapped to this utility
Provider profiles can help after the city and utility workflow is clear. They do not replace the official source trail.
Aldrich Backflow Services
Officially listed in Modesto's certified tester directory.
Backflow Prevention Specialists, Inc.
Officially listed in Modesto's certified tester directory.
C&C Backflow
Officially listed in Modesto's certified tester directory.
Support guides
Read these before acting on the Modesto workflow
How we verify local backflow rules
What counts as an official source, how local utility pages override generic assumptions, and how stale pages are re-verified.
Residential vs commercial backflow rules
Why the local trigger is rarely just residential versus commercial, and how utilities actually split hazard, irrigation, multifamily, and managed-property cases.
Backflow test cost
How to think about annual testing, repair, and retest pricing without confusing a market quote with the compliance rule.
Who needs a backflow preventer
A practical guide to the property types, hazard classes, and devices that usually trigger backflow assembly requirements.