Riverside / irrigation compliance
Riverside Public Utilities requires approved backflow assemblies to be tested after installation, relocation, or repair and at least annually. For irrigation customers, the practical job is to identify the correct assembly, use an accepted certified tester, meet the notice deadline, and preserve the submitted result.
Primary keyword: Riverside irrigation backflow testing
Key Takeaways
Riverside Public Utilities' Water Rule 13 says the water customer receives an annual testing notice when an assembly needs to be tested. The notice includes a date by which testing must be completed and results submitted to the utility.
The rule says an approved backflow prevention assembly must be tested immediately after installation, relocation, or repair and at least annually after that. It also allows the utility to require more frequent testing when necessary.
Those are Riverside customer instructions, not a universal deadline for every Inland Empire property. Owners should use the current notice for the account and contact Riverside Public Utilities when the assembly, tester, or due-date information is unclear.
An irrigation connection can create a path between a property's landscape system and the public water supply. Fertilizer equipment, standing water, soil, animal waste, broken sprinkler components, or other site conditions can increase the consequence if pressure conditions allow water to move in the wrong direction.
California's adopted Cross-Connection Control Policy Handbook staff report cites survey research in which irrigation systems appeared in 62% of identified cross-connections. The same cited surveys listed fire systems and garden or washdown hoses at 43% each and boilers at 38%.
Those percentages describe the cited survey findings. They are not a current Riverside inventory or proof that 62% of Riverside properties have an irrigation cross-connection. Their value is practical: irrigation should not be omitted when a property team inventories assemblies and prepares for annual testing.
California's revised Cross-Connection Control Policy Handbook was adopted April 21, 2026. It requires public water systems to ensure that backflow prevention assemblies in their programs are field tested at least annually, with more frequent testing possible for high-hazard premises or assemblies at increased risk of failure.
The handbook also requires field testing after installation, repair, winterizing depressurization, or permanent relocation. For compliance work from July 1, 2026 through June 30, 2027, testers used by public water systems must hold certification from an organization recognized in California.
The statewide handbook defines the public-water-system program duties. Riverside's rule and current customer notice define the property-facing workflow, including the accepted tester, due date, and report-submission process.
Prepare the assembly and the paperwork together so a completed field test does not become a missed reporting step.
The current utility notice controls the account-specific process, but these distinctions answer the most common planning questions.
Riverside's published rule says approved backflow assemblies are tested at least annually and immediately after installation, relocation, or repair. The utility may require more frequent testing when necessary.
No. California's staff report cites survey findings in which irrigation appeared in 62% of identified cross-connections. It is useful hazard-inventory evidence, not a Riverside-specific prevalence estimate.
Riverside's Water Rule 13 states that testing and maintenance costs are the responsibility of the water customer.
No. California's current handbook requires field testing after repair, and the passing result still needs to follow the serving utility's reporting process.
Use a tester whose certification is accepted for the utility's compliance work. Confirm the current Riverside notice and tester requirements before scheduling.
