Leak Detection in California
Leak Detection across California: the 1,921 ZIP codes and 726 cities we route calls in, and who licenses plumbers in the state.
Free to homeowners in California — the contractor pays us for the introduction, you never do.
Where we listen
Our leak detection coverage in California runs to 1,921 ZIP codes in 726 cities. In a state of large municipalities most of the supply run a leak can hide in is under a street or a driveway rather than inside the house, and the meter is often a long way from the building. That distance is why a rising bill can show no damp anywhere indoors.
Source: coverage area as published by our call partner; place and county names from the US Census Bureau.
We route leak detection calls in 1,921 ZIP codes across 726 California cities, in 40 counties.
What this site is
AcousticLeak is a referral service, not a contractor. We connect homeowners with independent contractors. Contractors are required to hold whatever credential their state or municipality demands. We carry out no work and no leak location, we do not set prices, and we never charge homeowners anything — the contractors in our network pay us when we route them a call. Nothing here is a statement about what your own utility will credit; only your utility can tell you that.Checking a credential in California
California licenses are issued by the Contractors State License Board, which publishes a public search you can use before work begins. California licenses the C-36 plumbing contractor; there is no state journeyman license.
22 of the 40 California counties we cover, the ones we cover most of
- Alameda County 68 ZIP codes
Oakland, Berkeley, Hayward, Fremont, San Leandro, Alameda, Castro Valley, Emeryville, Livermore and 7 more - Contra Costa County 52 ZIP codes
Concord, Richmond, Walnut Creek, Moraga, Antioch, Danville, El Sobrante, San Ramon, Alamo and 21 more - Humboldt County 21 ZIP codes
Eureka, Arcata, Bayside, Blue Lake, Carlotta, Ferndale, Fields Landing, Fortuna, Hydesville and 9 more - Los Angeles County 494 ZIP codes
Los Angeles, Long Beach, Pasadena, Glendale, Burbank, Van Nuys, Inglewood, North Hollywood, Santa Monica and 117 more - Marin County 40 ZIP codes
Novato, San Rafael, Corte Madera, Fairfax, Larkspur, Mill Valley, San Anselmo, San Quentin, Sausalito and 16 more - Monterey County 21 ZIP codes
Salinas, Monterey, Carmel, Aromas, Carmel by the Sea, Castroville, Marina, Moss Landing, Pacific Grove and 2 more - Orange County 144 ZIP codes
Anaheim, Irvine, Santa Ana, Orange, Fullerton, Garden Grove, Huntington Beach, Newport Beach, Buena Park and 35 more - Placer County 20 ZIP codes
Auburn, Roseville, Rocklin, Carnelian Bay, Foresthill, Granite Bay, Kings Beach, Lincoln, Loomis and 6 more - Riverside County 84 ZIP codes
Riverside, Moreno Valley, Corona, Temecula, Hemet, Menifee, Perris, Lake Elsinore, Murrieta and 27 more - Sacramento County 131 ZIP codes
Sacramento, Elk Grove, Citrus Heights, Rancho Cordova, Carmichael, Folsom, Antelope, Courtland, Elverta and 14 more - San Bernardino County 62 ZIP codes
San Bernardino, Fontana, Rancho Cucamonga, Ontario, Hesperia, Loma Linda, Redlands, Upland, Chino and 16 more - San Diego County 178 ZIP codes
San Diego, Chula Vista, Escondido, Oceanside, Carlsbad, La Jolla, El Cajon, La Mesa, San Marcos and 39 more - San Francisco County 51 ZIP codes
San Francisco - San Joaquin County 41 ZIP codes
Stockton, Tracy, Lodi, Manteca, Acampo, Clements, Escalon, French Camp, Lathrop and 6 more - San Luis Obispo County 34 ZIP codes
San Luis Obispo, Arroyo Grande, Atascadero, Grover Beach, Los Osos, Morro Bay, Oceano, Paso Robles, Pismo Beach and 10 more - San Mateo County 36 ZIP codes
Redwood City, San Mateo, Daly City, Burlingame, Menlo Park, South San Francisco, Atherton, Belmont, Brisbane and 13 more - Santa Barbara County 24 ZIP codes
Santa Barbara, Lompoc, Santa Maria, Buellton, Carpinteria, Goleta, Guadalupe, Los Alamos, New Cuyama and 3 more - Santa Clara County 106 ZIP codes
San Jose, Santa Clara, Mountain View, Palo Alto, Sunnyvale, Los Gatos, Campbell, Los Altos, Cupertino and 9 more - Santa Cruz County 20 ZIP codes
Santa Cruz, Aptos, Watsonville, Ben Lomond, Boulder Creek, Brookdale, Capitola, Davenport, Felton and 4 more - Sonoma County 38 ZIP codes
Santa Rosa, Petaluma, Rohnert Park, Sebastopol, Bodega, Bodega Bay, Cloverdale, Cotati, Eldridge and 14 more - Stanislaus County 28 ZIP codes
Modesto, Turlock, Ceres, Crows Landing, Denair, Farmington, Hickman, Hughson, Keyes and 8 more - Ventura County 36 ZIP codes
Oxnard, Simi Valley, Ventura, Camarillo, Thousand Oaks, Moorpark, Newbury Park, Westlake Village, Brandeis and 8 more
18 more California counties are inside the coverage area and are not listed here. If your ZIP code is in California, the call reaches a contractor.
What that coverage looks like
Sacramento alone accounts for 100 of the state's 1,921 covered ZIP codes, and Los Angeles County for 494. Dense coverage like that is where a leak call is answered quickest; the 40 counties behind it are where the drive time starts to matter, and where locating the leak precisely before anyone is dispatched saves the most.
How a leak detection job goes
A leak you cannot see is found with sound and with pressure, not by digging until something turns up. The meter is isolated and watched, the run is listened along, and the point is marked before any surface is opened. What that is worth is simple arithmetic: the cost of locating is fixed, and the cost of opening the wrong three meters of concrete is not.
What the call asks about leak detection
- Whether the meter moves with every tap in the house shut off — that one test separates a leak from a fitting.
- Where the water is showing, if it is showing at all: a ceiling, a wall, a warm patch on a floor, or only the bill.
- Whether the house is on a slab, a crawl space or a basement, because that decides how the run is reached.
Every California city we route in
230 cities, ordered by size. Dense building stock is where a leak on one service line is hardest to hear and slowest to surface. Each page carries that city’s own numbers and the ZIP codes we route there.
- San Francisco 45%
- Berkeley 44%
- San Marino 41%
- Albany 40%
- Altadena 36%
- Oakland 36%
- Huntington Park 35%
- Fairfax 35%
- Emeryville 35%
- South Pasadena 34%
- Alameda 32%
- Pasadena 30%
- Boulder Creek 29%
- Los Angeles 29%
- Beverly Hills 27%
- San Anselmo 26%
- Burlingame 26%
- Pacific Grove 26%
- Venice 26%
- Maywood 25%
- Alhambra 24%
- South Gate 22%
- Eureka 22%
- Glendale 22%
- San Pedro 21%
- Saint Helena 21%
- Long Beach 19%
- Sausalito 19%
- Sierra Madre 19%
- San Fernando 17%
- Wilmington 17%
- Fillmore 17%
- Mill Valley 17%
- Santa Barbara 16%
- Monrovia 16%
- Lynwood 16%
- Laguna Beach 15%
- Healdsburg 15%
- Santa Cruz 15%
- Coronado 15%
- Inglewood 14%
- Larkspur 14%
- El Cerrito 14%
- San Gabriel 14%
- Winters 14%
- Richmond 13%
- Santa Monica 13%
- Petaluma 13%
- Sebastopol 13%
- West Hollywood 13%
- Burbank 13%
- La Crescenta 12%
- Santa Paula 12%
- Montrose 12%
- Vallejo 12%
- Bell Gardens 12%
- Orland 12%
- Rosemead 11%
- Tujunga 11%
- Gustine 11%
- San Leandro 11%
- Corte Madera 11%
- Palo Alto 11%
- Carmel 11%
- Lomita 10%
- Monterey 10%
- Gridley 10%
- Watsonville 10%
- Martinez 10%
- Hermosa Beach 10%
- San Luis Obispo 10%
- Lodi 10%
- Compton 10%
- Jackson 10%
- Culver City 10%
- Hughson 10%
- Fortuna 10%
- Pomona 10%
- Newman 10%
- Redlands 10%
- Ventura 9%
- Redwood City 9%
- Montebello 9%
- Oroville 9%
- Stockton 9%
- El Monte 9%
- Arcata 9%
- Capitola 9%
- Rio Linda 9%
- Willows 9%
- Napa 9%
- San Rafael 8%
- La Canada Flintridge 8%
- National City 8%
- Whittier 8%
- Los Gatos 8%
- Studio City 8%
- Menlo Park 8%
- Claremont 8%
- Santa Ana 8%
- Oakdale 8%
- San Bruno 8%
- Sunland 8%
- Temple City 8%
- Soquel 8%
- San Bernardino 8%
- South San Francisco 8%
- Woodland 8%
- Belvedere Tiburon 8%
- Sacramento 8%
- Sonoma 8%
- Red Bluff 8%
- El Segundo 7%
- Carpinteria 7%
- South El Monte 7%
- Greenbrae 7%
- San Mateo 7%
- Colton 7%
- Daly City 7%
- San Carlos 7%
- Valley Village 7%
- Benicia 7%
- Turlock 7%
- Ojai 7%
- Scotts Valley 7%
- Manhattan Beach 7%
- Mentone 7%
- North Hollywood 7%
- Millbrae 7%
- Marysville 7%
- Signal Hill 7%
- San Diego 7%
- Stanford 6%
- Sun Valley 6%
- Escalon 6%
- Chico 6%
- Riverside 6%
- Orinda 6%
- Placerville 6%
- Bellflower 6%
- Pico Rivera 6%
- Auburn 6%
- Ione 6%
- Modesto 6%
- Lawndale 6%
- Baldwin Park 6%
- La Jolla 6%
- Corning 6%
- Rio Vista 6%
- Loma Linda 6%
- Hayward 6%
- Live Oak 6%
- Paramount 6%
- Pacific Palisades 6%
- Upland 6%
- Half Moon Bay 6%
- San Jose 6%
- Salinas 5%
- Gilroy 5%
- Glendora 5%
- Sherman Oaks 5%
- Monterey Park 5%
- Newport Beach 5%
- La Verne 5%
- Banning 5%
- Arroyo Grande 5%
- San Dimas 5%
- Sonora 5%
- Fullerton 5%
- Santa Rosa 5%
- Artesia 5%
- Hawaiian Gardens 5%
- Orange 5%
- Redondo Beach 5%
- Gardena 5%
- Winton 5%
- Cotati 5%
- Pismo Beach 5%
- Merced 4%
- Ripon 4%
- Ontario 4%
- Templeton 4%
- Yuba City 4%
- Ceres 4%
- Pacoima 4%
- La Habra 4%
- Van Nuys 4%
- Del Mar 4%
- Lafayette 4%
- Bloomington 4%
- Magalia 4%
- Hawthorne 4%
- Patterson 4%
- Azusa 4%
- Valley Springs 4%
- Rancho Santa Fe 4%
- Atascadero 4%
- Grover Beach 4%
- Arcadia 4%
- Delhi 4%
- Morro Bay 4%
- Castro Valley 4%
- La Mesa 4%
- Downey 4%
- Highland 4%
- Santa Maria 4%
- Santa Clara 4%
- Palos Verdes Peninsula 4%
- Malibu 4%
- Torrance 4%
- Pittsburg 4%
- Mountain View 4%
- San Pablo 4%
- McKinleyville 3%
- Novato 3%
- Harbor City 3%
- Yucaipa 3%
- Tracy 3%
- Covina 3%
- Los Altos 3%
- Paso Robles 3%
- El Sobrante 3%
- Ramona 3%
- Aptos 3%
- Clayton 3%
- Dixon 3%
- Alpine 3%
- Alamo 3%
- Norco 3%
- Littlerock 3%
Before you call
A leak is located before anything is dug. What that costs and what it does not, and the questions to ask before the work is booked, are on the pages above.
