A water bill that jumps without explanation is one of the most common reasons Fontana homeowners look for leak detection. Before calling, try a simple meter test: turn off every fixture and appliance that uses water, then watch the meter at the curb for a few minutes. If the dial or leak indicator still moves, water is going somewhere. Your provider, shown on your bill, may also be able to help you read the meter.
Fontana has a lot of slab-on-grade homes, so hidden leaks often sit under the floor or inside walls rather than in a crawlspace. Common clues are a warm patch of floor, damp baseboards, the sound of water with everything off, or a stain on drywall. Outside, leaking irrigation lines and valves are a frequent culprit, especially during the long summer watering season, and a wet spot that never dries in a side yard is worth noting.
Leak detection is about finding the source with as little opening up as possible. Contractors may use acoustic listening, pressure testing or thermal imaging. Ask which methods they plan to use, what the detection fee covers, and whether the repair is quoted separately. More background is on our California leak detection page.
Leak Detection in Fontana : What We Handle
- ✓Unexplained increases in water bills for Fontana homes.
- ✓Suspected slab leaks under concrete floors.
- ✓Leaks inside walls, ceilings and around fixtures.
- ✓Irrigation, valve and outdoor supply line leaks.
- ✓Meter checks and pressure testing to narrow down the source.
Signs of a hidden leak
- A water bill that rises without a change in use
- The water meter's low-flow indicator moving while every fixture is off
- A warm or damp spot on a slab floor, or cracked and lifting tile
- The sound of running water inside a wall or under the floor
- Mold, musty odors, or stains on drywall and baseboards
- Low water pressure on one line
- A soggy patch in the yard between the meter and the house
Why California homes leak where they do
California's housing boom after World War II produced hundreds of thousands of slab-on-grade tract homes across Los Angeles County, Orange County, the Inland Empire and the Bay Area. In many of them, copper water lines run beneath the concrete. After decades of service, copper can develop pinhole leaks from internal wear, water chemistry or abrasion against the slab. Hot water lines often fail first, which is why a warm patch on the floor is a classic clue.
Leak Detection Services We Offer in Fontana
✓Household Leak Investigation
Discuss visible drips and unexplained water use.
✓Concealed Pipe Leak Detection
Ask how the location is narrowed down before opening walls or floors.
✓Possible Slab Leak Assessment
Report damp or warm floor areas without treating them as a confirmed diagnosis.
✓Leak Location and Repair Planning
Ask for findings, access requirements and alternative repair approaches.
How It Works in Fontana
- 1
Describe the issue
Give the city, ZIP code, symptoms and safe access details.
- 2
Check contractor availability
Confirm whether an independent contractor handles your location and this type of job.
- 3
Agree on the assessment
Ask about the visit fee, inspection method and expected arrival window.
- 4
Review the proposal
Confirm the findings, repair options, total scope and terms before authorising work.
Leak Detection Pricing in Fontana
Independent contractors set their own prices. Request the visit or diagnostic fee and proposed repair scope before booking. This site does not quote a fixed statewide price.
Want the full picture of this service? See our Leak Detection page, or everything we do in Fontana, CA.