Leak Detection in Ontario

Ontario sits in the heart of the Inland Empire, where summer temperatures regularly push past 100°F and the soil — a mix of alluvial clay and sandy loam deposited by the Santa Ana River watershed — expands and contracts with the seasons. That ground movement puts real stress on water lines, and it’s one reason so many Ontario homeowners eventually notice a water bill that’s crept up $40 or $50 a month with no obvious explanation. When that happens, the leak is rarely where you’d expect it.

Why Ontario Properties See More Hidden Leaks

The Inland Empire’s soil behavior is a genuine factor here. Clay-heavy ground swells when it absorbs water and shrinks during dry stretches, and Ontario gets both extremes — wet winters followed by long, hot summers. That cycle works on buried supply lines and slab-embedded pipes the same way it works on concrete driveways: small shifts, repeated over years, open micro-cracks that eventually become slow leaks.

Ontario’s housing stock adds another layer. The city grew in waves — post-WWII tract homes in older residential corridors, 1970s and 1980s subdivisions, and newer master-planned development out toward the eastern edges. Homes built in the 1960s and 1970s often still have galvanized steel supply lines, which corrode from the inside out. By the time corrosion causes a pinhole leak, the pipe wall looks fine from the outside. Electronic detection finds it; visual inspection won’t.

Slab foundations are the norm across much of Ontario, which means a leak under the floor isn’t accessible without the right equipment. Water migrating through a slab can travel several feet from the actual breach before it surfaces — if it surfaces at all. In many cases, the first sign is warm spots on tile, a faint sulfur or musty smell near a baseboard, or that persistently elevated water bill.

Our Leak Detection Process in Ontario

When a call comes in from an Ontario address, the first step is a pressure test on the supply system to confirm a leak is present and to isolate whether it’s on the hot or cold side. That alone narrows the search considerably.

From there, the approach depends on what the property shows us:

• Electronic listening equipment picks up the acoustic signature of water escaping under pressure — even through several inches of concrete slab.
• Thermal imaging reveals temperature differentials on floors and walls that indicate moisture movement beneath the surface.
• Tracer gas detection is used when acoustic methods can’t pinpoint a location precisely — inert gas introduced into the line migrates to the leak point and is detected at the surface.

The goal is always to find the exact breach before any concrete is cut or drywall is opened. Unnecessary demolition costs money and time; targeted detection avoids it.

Reaching Ontario from Corona

RT Olson is based in Corona, and Ontario is a straightforward run west on the 91 or up the 15 — typically 20 to 30 minutes depending on traffic. Because we’re available 24/7, a call at 2 a.m. about water pooling near a water heater or a meter that won’t stop spinning gets the same response as a daytime call. We cover all of Ontario, from the older neighborhoods near downtown to the newer residential areas closer to the 60 corridor.

Local Note

Ontario’s water is supplied through Inland Empire Utilities Agency service areas and several municipal systems, and local water tends to be moderately hard — high in dissolved calcium and magnesium. Hard water accelerates mineral buildup inside copper fittings and at valve seats, which can cause slow weeping leaks at joints that look and feel dry on the outside. If you’re seeing intermittent damp spots near shut-off valves or supply connections under sinks, mineral scaling at the fitting is worth ruling out before assuming the pipe itself has failed. It’s a pattern that comes up more in the Inland Empire than in coastal communities where water chemistry is different.

What to Do While You Wait

If your water meter is spinning with everything in the house shut off, locate your main shut-off — typically near the front of the property at the meter box or at the house side of the service line — and close it. This stops active water loss and reduces the risk of secondary damage to flooring or drywall while a technician is on the way. Don’t try to open walls or dig near the meter; disturbing the area can make acoustic detection harder.

When you’re ready to get a definitive answer on where that leak is, call RT Olson at (951) 344-5596. We’ll locate it precisely so the repair is targeted, not a guess.