Rialto has three water retailers, the City's own Rialto Water Services, West Valley Water District and Fontana Water Company, so a commercial property's water rules depend on its address. Plumbing permits come from the City's Building & Safety Division. Call the number on this page to be connected with a local plumber in Rialto.

Who supplies water to our Rialto building?
According to the City's drought contingency planning application, Rialto is served by the City through Rialto Water Services, which a third party operates, and also by West Valley Water District and Fontana Water Company. The City system relies mainly on groundwater from wells in five adjudicated basins, supplemented by Baseline Feeder water from San Bernardino Valley Municipal Water District and surface water from the east side of the San Gabriel Mountains. The name on the water bill tells you which retailer sets the rules for your meter, service line and any cross-connection requirements, so start there before scheduling work near the meter.
What should we know about sewer?
The City's application describes the Rialto Wastewater Treatment Plant, a tertiary plant averaging about 7 million gallons a day, and which agency maintains sewer collection lines, and where an owner's lateral ends, can vary by address. Ask the City before work that touches the connection at the main. What doesn't change is that grease, wipes and paper from restaurants and shared restrooms clog private lines long before the flow reaches any plant, and that buildings with long runs to the street are much easier to service when cleanouts are accessible.
Where do permits come from?
The Community Development Department's Building & Safety Division handles permits at 150 S Palm Avenue. Reach it at (909) 820-2505 or [email protected], and file applications through the City's Tyler EnerGov portal. Ask the division what a particular job requires, whether it's a tenant improvement that moves fixtures, a water heater replacement or a sewer line repair, before the plumber starts. Earlier permits and as-built drawings are worth keeping on hand, since they show where lines run and cut down on locating time.
A local note
Because three retailers share the city, two businesses on the same block can have different water providers and different contacts for a problem at the meter. Bring a recent water bill when you call so the plumber knows whose meter, rules and emergency number apply. If an assembly protects a fire line or irrigation service, ask that same retailer how often it wants test results and where to send them.
Commercial Plumbing questions in Rialto
How do we confirm which water agency serves our commercial address?
Who do we call after hours if the problem is on the utility's side?
Can plumbing work be scheduled before opening or after closing?
In a leased space, who arranges plumbing repairs?
More plumbing services in Rialto
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