Leak Detection in Rialto, CA

Which water provider do I call if the leak is at the meter?

That depends on your address. Rialto has three water retailers: the City of Rialto through Rialto Water Services, West Valley Water District and Fontana Water Company. Your water bill shows which one serves you. If water is surfacing at the meter box or in the street, contact that provider first, because the leak may be on its side of the meter. Anything from the meter to the house, and all the plumbing inside, is generally the owner's to repair.

Where do leaks usually hide in Rialto homes?

Most houses here sit on concrete slabs, so supply lines run under the floor or through the walls and attic. Slab leaks on the hot side often show up as a warm spot on tile or the sound of running water. Inside, toilet flappers, faucet cartridges, water heater connectors and washing machine hoses are frequent sources. Outdoors, look at the service line between meter and house, hose bibs and sprinkler valves. The City's own water system relies mainly on local groundwater; in any home with hard water, a slow drip often leaves a white mineral crust before it leaves a puddle.

How does a plumber find a leak without tearing things up?

The usual approach is to confirm water loss at the meter, then close valves to separate indoor plumbing from the yard line and irrigation. From there, a plumber may pressure-test the hot and cold sides, listen with acoustic equipment, scan for temperature differences with a thermal camera, or use tracer gas on a buried line. The goal is a precise mark so only a small section of wall, floor or lawn has to be opened.

A short local note

If the repair needs a permit, the City of Rialto Building & Safety Division handles it, with online applications through the city's permit portal. Ask the plumber whether your repair is the kind that needs one. If you can't tell which water provider serves a property you just bought, check with the previous owner or call the providers listed above.