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California Service · Detection

Water Leak Detection in California

Non-invasive detection for hidden leaks inside walls, ceilings, and under floors.

Quick answer: Residential and commercial water leak detection throughout California. Locate hidden leaks behind walls, under floors, and in ceilings without unnecessary demolition.
Already know where the leak is? See our Water Leak Repair page for how the fix works.
Water Leak Detection illustration
Technician using acoustic leak detection equipment to locate a water leak outside a California home
Customer Success Story · Water Leak Detection

The Patel Family, who lives in Rockridge, Oakland, reached out after noticing a musty odor in a room with no obvious source. We start with a whole-home pressure and usage check to confirm whether a leak exists, then use acoustic listening devices and moisture meters to trace it to a specific wall section, joist bay, or fixture, rather than opening multiple areas to search. The diagnostic report was enough to move the insurance claim forward without further back-and-forth.

— The Patel Family, Rockridge, Oakland

What is water leak detection?

Not every leak announces itself with a puddle. Many hidden water leaks develop slowly inside a wall cavity, under a cabinet, or above a ceiling, and are only noticed once staining, warped material, or a spike in the water bill shows up. Our general water leak detection service covers the full interior plumbing system: supply lines, fixture connections, water heaters, and any point where a line runs through a wall, floor, or ceiling.

We start with a whole-home pressure and usage check to confirm whether a leak exists, then use acoustic listening devices and moisture meters to trace it to a specific wall section, joist bay, or fixture, rather than opening multiple areas to search.

Signs you may need water leak detection

  • Discolored or bubbling paint on a wall or ceiling
  • A musty odor in a room with no obvious source
  • Warped baseboards, cabinets, or flooring near plumbing walls
  • Low water pressure at one or more fixtures
  • A water bill that jumped without a clear explanation
  • The water meter's leak indicator dial moving with everything turned off

How water leak detection works

  1. Schedule your inspection

    Call or request an appointment online. Same-day slots are available across California for active leaks.

  2. On-site diagnostic

    A technician arrives with acoustic listening equipment, thermal imaging, and pressure or camera tools matched to your specific leak type.

  3. Pinpoint & confirm

    The leak's exact location is marked and explained to you in plain terms, so nothing gets opened up on a guess.

  4. Clear next steps

    You receive a written diagnostic report you can hand to your plumber, restoration team, or insurance company, with repair or fix options discussed on the spot.

Water Leak Detection across California

We provide water leak detection for homeowners, property managers, and businesses throughout the state, including these service areas:

Los Angeles, CASan Diego, CASan Francisco, CASan Jose, CAFresno, CASacramento, CALong Beach, CAOakland, CABakersfield, CAAnaheim, CASanta Ana, CARiverside, CAStockton, CAIrvine, CAChula Vista, CAFremont, CASan Bernardino, CAModesto, CAFontana, CAOxnard, CAMoreno Valley, CAHuntington Beach, CAGlendale, CASanta Clarita, CAGarden Grove, CARancho Cucamonga, CASanta Rosa, CAOntario, CALancaster, CAElk Grove, CACorona, CAPalmdale, CASalinas, CAPomona, CAHayward, CAEscondido, CATorrance, CASunnyvale, CAOrange, CAFullerton, CAVictorville, CAPasadena, CASanta Clara, CAClovis, CASimi Valley, CAVallejo, CAConcord, CAFairfield, CAThousand Oaks, CABerkeley, CAAntioch, CATemecula, CARichmond, CAMurrieta, CACarlsbad, CACosta Mesa, CADowney, CARialto, CAWest Covina, CAEl Monte, CAOceanside, CARoseville, CAVisalia, CAMenifee, CASanta Maria, CASan Buenaventura (Ventura), CAJurupa Valley, CAChico, CAVacaville, CASan Mateo, CABurbank, CAHesperia, CATracy, CAEl Cajon, CAInglewood, CADaly City, CAMerced, CAVista, CANorwalk, CAChino, CAManteca, CASan Marcos, CAIndio, CARedding, CAHemet, CAFolsom, CACarson, CACompton, CAMission Viejo, CASanta Monica, CAWestminster, CARancho Cordova, CASanta Barbara, CACitrus Heights, CALake Forest, CASan Ramon, CAWhittier, CAMountain View, CASan Leandro, CATurlock, CAUnion City, CAYorba Linda, CAWalnut Creek, CAApple Valley, CARedwood City, CANewport Beach, CADiamond Bar, CASan Clemente, CAPleasanton, CAMilpitas, CALodi, CACamarillo, CAAlhambra, CALivermore, CABuena Park, CAUpland, CAPerris, CANapa, CAPalm Desert, CACathedral City, CAYucaipa, CALynwood, CARedondo Beach, CAPittsburg, CANovato, CAChino Hills, CACerritos, CAMonterey Park, CARosemead, CABaldwin Park, CAMontebello, CABellflower, CAPico Rivera, CALa Habra, CAPlacentia, CACypress, CAEncinitas, CAPoway, CAImperial Beach, CALa Mesa, CACoronado, CANational City, CAMonrovia, CAAzusa, CAGlendora, CAClaremont, CALa Verne, CASan Dimas, CAWalnut, CAMontclair, CARedlands, CAColton, CALoma Linda, CAAlameda, CADublin, CAEmeryville, CANewark, CAPiedmont, CAOroville, CAParadise, CABrentwood, CAClayton, CAEl Cerrito, CAHercules, CAMartinez, CAOrinda, CAPinole, CAPleasant Hill, CASan Pablo, CACoalinga, CAFowler, CAKerman, CAReedley, CASanger, CASelma, CAHanford, CADelano, CARidgecrest, CATehachapi, CALemoore, CABrea, CADana Point, CALaguna Beach, CASantee, CASolana Beach, CAVernon, CASignal Hill, CACulver City, CAMenlo Park, CAFoster City, CATustin, CAAliso Viejo, CANorco, CAEastvale, CALos Gatos, CAGilroy, CASaratoga, CACampbell, CAHawthorne, CAGardena, CAHermosa Beach, CAManhattan Beach, CAEl Segundo, CACudahy, CAMaywood, CATemple City, CADuarte, CAPalos Verdes Estates, CARolling Hills Estates, CARolling Hills, CALomita, CABradbury, CAIndustry, CALa Puente, CAHawaiian Gardens, CAAtherton, CABelmont, CAHalf Moon Bay, CAMillbrae, CABrisbane, CABurlingame, CASeal Beach, CALos Alamitos, CA
4.8
Based on 6+ verified customer reviews across California

What California homeowners say about water leak detection

★★★★★

“The floor in our hallway had a warm spot for weeks. They found the slab leak in under an hour with the listening equipment and marked a tiny area instead of tearing up the whole hallway. Huge relief.”

MTMarcus T. · Los Angeles, CA
★★★★★

“Our water bill jumped for two months straight and we couldn't find why. Turned out it was a slow leak behind the water heater. Professional, on time, and explained everything on the spot.”

PRPriya R. · Los Angeles, CA
★★★★★

“Salt air had corroded a fitting outside near the meter box. They traced it with the acoustic equipment without digging up my whole side yard first. Appreciated the straightforward report.”

DKDaniel K. · San Diego, CA
★★★★☆

“Good experience overall, technician was knowledgeable and thorough. Took a little longer than expected but they were clearly being careful about pinpointing the exact spot before marking it.”

AMAngela M. · San Diego, CA
★★★★★

“Old Victorian with plaster walls everywhere, so I was dreading this. They used thermal imaging and found the leak behind one wall panel instead of opening up the whole room. Saved us a big repair bill.”

CBChris B. · San Francisco, CA
★★★★★

“Ground near our garage had been soft for a while. Turned out to be the main line. They marked the exact dig spot and our plumber only had to open a two-foot section instead of the whole path.”

WLWei L. · San Francisco, CA

Water Leak Detection FAQs

How can I tell if I have a hidden leak before calling for an inspection?Toggle answer
Turn off every fixture and appliance that uses water, then check your water meter. If the leak indicator dial is still moving, or the meter reading changes over a 1-2 hour period with nothing running, that's a strong sign of a hidden leak somewhere in the system.
Do you check appliances like water heaters and washing machines too?Toggle answer
Yes. Supply and drain connections at water heaters, washing machines, dishwashers, and ice makers are common leak points and are included as part of a full interior water leak inspection.
Is leak detection covered by homeowners insurance in California?Toggle answer
Many California homeowners' policies cover sudden and accidental water damage, though coverage for the detection work itself and for gradual, long-term leaks varies by carrier and policy. We recommend confirming the specifics with your insurance provider, and we're glad to provide a written diagnostic report to support a claim.

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Need water leak detection in California?

Same-day appointments available. Call now or request an inspection online.

Call (844) 581-0720 Request Inspection