Well Drillers in San Mateo County, California

San Mateo County occupies the San Francisco Peninsula, with well drilling activity concentrated along the rural coastside communities of Half Moon Bay, La Honda, and Pescadero. While most of the bayside is served by municipal water, coastal and hillside properties often rely on private wells.

Licensed Contractors

9

Avg. Well Depth

~200 ft

County Seat

Redwood City

Licensed C-57 Contractors in San Mateo County

CLEAR HEART DRILLING INC

Active
SANTA ROSA, CA 95401
(707) 568 6095
Expires: 2026-06-30
License #780357· Verified Active C-57Services your area
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EARTH FLOW DRILLING COMPANY

Active
SANTA CRUZ, CA 95060
(831) 423 3288
Expires: 2028-03-31
License #800269· Verified Active C-57Services your area
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GUARDINO WELL DRILLING INC

Active
MORGAN HILL, CA 95037
(408) 779 5904
Expires: 2027-02-28
License #664960· Verified Active C-57Services your area
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HYDRO WORKS WELL & PUMP INC

Active
HAYWARD, CA 94541
(510) 363 5605
Expires: 2026-05-31
License #1091530· Verified Active C-57Services your area
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LANDINO DRILLING CO

Active
DAVENPORT, CA 95017
(831) 426 4129
Expires: 2028-01-31
License #334499· Verified Active C-57Services your area
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PACIFIC COAST WELL & PUMP INC

Active
SAN RAMON, CA 94583
(510) 581 6000
Expires: 2026-07-31
License #810579· Verified Active C-57Services your area
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PITCHER SERVICES LLC

Active
EAST PALO ALTO, CA 94403
(650) 531 8986
Expires: 2026-09-30
License #1044895· Verified Active C-57Services your area
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R W R CONSTRUCTION INC

Active
SAN RAFAEL, CA 94901
(415) 457 5658
Expires: 2027-08-31
License #527433· Verified Active C-57Services your area
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TAVARES PLUMBING AND PUMPS

Active
SANTA CLARA, CA 95050
(408) 472 2018
Expires: 2027-01-31
License #1100508· Verified Active C-57Services your area
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Well Drilling Permits in San Mateo County

San Mateo County Environmental Health Division issues well permits. Coastal zone requirements may apply for wells west of the ridge. Urban area wells require contamination assessments.

All well construction, modification, or destruction in California must be performed by a contractor holding a valid C-57 Well Drilling license issued by the Contractors State License Board (CSLB).

Geology & Drilling Conditions in San Mateo County

The peninsula's ridgeline separates two distinct hydrogeologic zones. Bayside areas have alluvial and bay mud deposits with managed groundwater. Coastside areas have Purisima Formation sandstone and coastal terrace deposits that provide moderate aquifer potential.

Frequently Asked Questions About Well Drilling in San Mateo County

Do I need a permit to drill a well in San Mateo County?
Yes, a well permit is required before any drilling can begin in San Mateo County. San Mateo County Environmental Health Division issues well permits. Coastal zone requirements may apply for wells west of the ridge. Urban area wells require contamination assessments. All well work must be performed by a contractor holding a valid California C-57 Well Drilling license.
How much does it cost to drill a well in San Mateo County?
Well drilling costs in San Mateo County typically range from $15,000 to $50,000 or more, depending on depth, geological conditions, and site accessibility. Average well depths in the area are around 200 feet. Getting quotes from multiple licensed C-57 contractors is the best way to estimate your specific project cost.
How deep are wells typically drilled in San Mateo County?
Wells in San Mateo County average around 200 feet deep, though actual depth varies with location, geology, and intended use. The peninsula's ridgeline separates two distinct hydrogeologic zones. Bayside areas have alluvial and bay mud deposits with managed groundwater. Coastside areas have Purisima Formation sandstone and coastal terrace deposits that provide moderate aquifer potential.
How do I find a licensed well driller in San Mateo County?
You can browse our directory of verified C-57 licensed well drilling contractors serving San Mateo County right on this page. Every contractor listed holds a valid California C-57 Well Drilling license verified through the Contractors State License Board (CSLB). We recommend contacting multiple drillers for quotes and checking their license status before hiring.
What should I know about water quality from a well in San Mateo County?
Water quality from private wells in San Mateo County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. San Mateo County Environmental Health can provide guidance on recommended testing. California does not regulate private well water quality, so testing is the homeowner's responsibility.

Nearby Counties

San Francisco County

Bay Area

Santa Clara County

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Central Coast

Alameda County

Bay Area