Well Water Testing in California
664 verified well water specialists across 339 cities in California.
Informational only. This page helps you find certified professionals.
It is not medical, legal, or structural safety advice. For any health or safety hazard, consult a
certified/licensed expert. See our verification methodology.
Cities in California
Select a city to view local well water specialists and pricing.
Bakersfield 22 pros Madera 16 pros Fresno 11 pros Yuba City 8 pros Paso Robles 8 pros Visalia 7 pros San Jose 7 pros Santa Rosa 7 pros Selma 6 pros San Francisco 6 pros Salinas 6 pros Napa 6 pros Chico 6 pros Sacramento 6 pros Ramona 5 pros Santa Maria 5 pros Escondido 5 pros Santa Cruz 5 pros Chowchilla 5 pros Lucerne Valley 5 pros Exeter 5 pros Wilton 5 pros Oroville 5 pros Woodland 5 pros Apple Valley 5 pros Hanford 5 pros Clovis Limited listings 4 pros Hemet Limited listings 4 pros Stockton Limited listings 4 pros Petaluma Limited listings 4 pros Lemoore Limited listings 4 pros Orange Limited listings 4 pros Riverside Limited listings 4 pros Valley Center Limited listings 4 pros Sonora Limited listings 4 pros Shingle Springs Limited listings 4 pros Atwater Limited listings 4 pros San Diego Limited listings 4 pros Watsonville Limited listings 4 pros Granite Bay Limited listings 4 pros Hayward Limited listings 4 pros Galt Limited listings 4 pros Templeton Limited listings 4 pros Signal Hill Limited listings 3 pros Cypress Limited listings 3 pros Orcutt Limited listings 3 pros Mariposa Limited listings 3 pros Pleasanton Limited listings 3 pros Irvine Limited listings 3 pros Orland Limited listings 3 pros Corning Limited listings 3 pros Reedley Limited listings 3 pros Oakhurst Limited listings 3 pros Los Gatos Limited listings 3 pros Rio Vista Limited listings 3 pros Aptos Limited listings 3 pros Tulare Limited listings 3 pros Fort Bragg Limited listings 3 pros Redding Limited listings 3 pros Kerman Limited listings 3 pros Ukiah Limited listings 3 pros Indio Limited listings 3 pros Auburn Limited listings 3 pros Dixon Limited listings 3 pros Frazier Park Limited listings 3 pros San Luis Obispo Limited listings 3 pros Coachella Limited listings 3 pros San Bernardino Limited listings 3 pros West Sacramento Limited listings 3 pros Tehachapi Limited listings 3 pros Modesto Limited listings 3 pros San Jacinto Limited listings 3 pros Escalon Limited listings 3 pros San Clemente Limited listings 3 pros Norco 2 pros Nevada City 2 pros Oak View 2 pros Denair 2 pros Alpine 2 pros Rocklin 2 pros Huntington Beach 2 pros Plymouth 2 pros Oakdale 2 pros Riverbank 2 pros San Martin 2 pros Dinuba 2 pros Riverdale 2 pros Danville 2 pros San Andreas 2 pros Middletown 2 pros Santa Barbara 2 pros Wrightwood 2 pros Stonyford 2 pros Grover Beach 2 pros Burlingame 2 pros Oakland 2 pros Rio Linda 2 pros Alturas 2 pros Fowler 2 pros Oxnard 2 pros Forestville 2 pros Barstow 2 pros Campo 2 pros Sun Valley 2 pros Porterville 2 pros Santa Fe Springs 2 pros Murrieta 2 pros Newark 2 pros Santa Clara 2 pros Sebastopol 2 pros Pearblossom 2 pros Pasadena 2 pros Palm Desert, 2 pros Elverta 2 pros Fullerton 2 pros Temecula 2 pros Thermal 2 pros Yreka 2 pros Bishop 2 pros Rancho Cordova 2 pros Winters 2 pros Merced 2 pros Arroyo Grande 2 pros Jamul 2 pros Corona 2 pros Mc Kinleyville 2 pros Anza 2 pros Ventura 2 pros Homeland 2 pros Anderson 2 pros Chino 1 pro Pismo Beach 1 pro Independence 1 pro Woodbridge 1 pro Lake Forest 1 pro Hornbrook 1 pro Burbank 1 pro Milpitas 1 pro Los Angeles 1 pro Occidental 1 pro Buellton 1 pro Corte Madera 1 pro Newcastle 1 pro Julian 1 pro Gold River 1 pro San Miguel 1 pro Garden Valley 1 pro Durham 1 pro Mission Viejo 1 pro Laton 1 pro Carson 1 pro San Mateo 1 pro Sylmar 1 pro Herlong 1 pro Concord 1 pro Crescent City 1 pro Colton 1 pro Ontario 1 pro Palermo 1 pro Richvale 1 pro Woodlake 1 pro Folsom 1 pro Terra Bella 1 pro Del Rey 1 pro Miranda 1 pro La Mesa 1 pro Carmichael 1 pro Castro Valley 1 pro Calimesa 1 pro Turlock 1 pro Wasco 1 pro Capitola 1 pro Morro Bay 1 pro Santa Ynez 1 pro Clearlake 1 pro Twentynine Palms 1 pro Twenty Nine Palms 1 pro Gilroy 1 pro Cohasset 1 pro Pacoima 1 pro Covelo 1 pro Point Richmond 1 pro Lakeport 1 pro Richmond 1 pro Cedarville 1 pro Adin 1 pro Newport Beach 1 pro Esparto 1 pro El Sobrante 1 pro Roseville 1 pro San Gabriel 1 pro Fairfield 1 pro Winton 1 pro Adelanto 1 pro Pleasant Hill 1 pro Chula Vista 1 pro Yermo 1 pro Winchester 1 pro Gridley 1 pro Quincy 1 pro Lake Elsinore 1 pro Glendale 1 pro Lodi 1 pro Hughson 1 pro Dos Palos 1 pro American Canyon 1 pro Orangevale 1 pro Fair Oaks 1 pro Antioch 1 pro Torrance 1 pro Squaw Valley 1 pro Newberry Springs 1 pro Upland 1 pro Whittier 1 pro Palos Verdes Peninsula 1 pro Nipomo 1 pro Menlo Park 1 pro Orinda 1 pro Shafter 1 pro Le Grand 1 pro Downey 1 pro Atascadero 1 pro Hydesville 1 pro Sutter 1 pro Guatay 1 pro Jackson 1 pro Delano 1 pro San Dimas 1 pro Mt Shasta 1 pro Cottonwood 1 pro Fontana 1 pro Moss Landing 1 pro Brentwood 1 pro Rosamond 1 pro Lockeford 1 pro Morgan Hill 1 pro Carlsbad 1 pro Grenada 1 pro Palo Cedro 1 pro Creston 1 pro Strathmore 1 pro Poway 1 pro Healdsburg 1 pro Upper Lake 1 pro Silverado 1 pro Brea 1 pro Artesia 1 pro Pico Rivera 1 pro Fulton 1 pro Livingston 1 pro Mc Clellan 1 pro South Lake Tahoe 1 pro Santa Clarita 1 pro Nubieber 1 pro Sanger 1 pro Cotati 1 pro Davenport 1 pro Sonoma 1 pro Shasta Lake 1 pro Orange Cove 1 pro Redlands 1 pro Santa Ana 1 pro Sutter Creek 1 pro Junction City 1 pro Littlerock 1 pro Ojai 1 pro Pittsburg 1 pro Garden Grove 1 pro Fort Jones 1 pro Mt Eden 1 pro Murphys 1 pro Anaheim 1 pro Mc Arthur 1 pro Laytonville 1 pro Fillmore 1 pro Stanton 1 pro Bonita 1 pro Oak Hills 1 pro Highland 1 pro Yucca Valley 1 pro Oceanside 1 pro Ferndale 1 pro Thousand Oaks 1 pro San Ramon 1 pro Zamora 1 pro Grass Valley 1 pro Kelseyville 1 pro Pleasant Grove 1 pro East Palo Alto 1 pro Ceres 1 pro Linden 1 pro Valley Springs 1 pro San Rafael 1 pro Los Banos 1 pro Carmel 1 pro Half Moon Bay 1 pro Belvedere Tiburon 1 pro Amador City 1 pro Alhambra 1 pro Clarksburg 1 pro Acampo 1 pro Coarsegold 1 pro Shingletown 1 pro Susanville 1 pro La Habra 1 pro Kensington 1 pro San Juan Capistrano 1 pro Olivehurst 1 pro Camarillo 1 pro Altaville 1 pro Hinkley 1 pro Lancaster 1 pro Lincoln 1 pro Diamond Bar 1 pro National City 1 pro Red Bluff 1 pro Rescue 1 pro Douglas City 1 pro Sherman Oaks 1 pro Armona 1 pro Hickman 1 pro Dulzura 1 pro Acton 1 pro Malibu 1 pro El Dorado Hills 1 pro Tollhouse 1 pro Windsor 1 pro Buena Park 1 pro Chino Hills 1 pro Berkeley 1 pro North Highlands 1 pro Beaumont 1 pro Raymond 1 pro Spreckels 1 pro Lakeside 1 pro Springville 1 pro Wishon 1 pro Willits 1 pro Janesville 1 pro
Well Water Testing FAQ
- How often should I test my well water?
- The CDC recommends annual testing for bacteria, nitrates, and pH — and after any flooding or nearby land-use change.
- What does a well water test cost?
- A standard panel runs $150–$600 depending on the contaminants screened (bacteria, nitrates, arsenic, lead, VOCs).
- Why use a certified lab?
- Only EPA/state-certified or NELAP-accredited labs produce results accepted for real-estate transactions and regulatory purposes.
Other safety services in California
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