Well Drillers in Contra Costa County, California

Contra Costa County stretches from the San Francisco Bay shoreline through suburban communities to the rural eastern reaches near Brentwood and Byron. Well drilling activity is concentrated in the eastern portion, where agricultural and rural residential properties rely on groundwater.

Licensed Contractors

7

Avg. Well Depth

~200 ft

County Seat

Martinez

Licensed C-57 Contractors in Contra Costa County

ALTAMONT WATER WELL AND PUMP

Active
PLEASANTON, CA 94566
(925) 980 1066
Expires: 2027-03-31
License #958797· Verified Active C-57Services your area
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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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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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MARTELL WATER SYSTEMS INC

Active
PITTSBURG, CA 94565
(925) 432 4282
Expires: 2027-05-31
License #510952· Verified Active C-57Services your area
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MCRAE K M INC

Active
MT EDEN, CA 94557
(510) 537 6539
Expires: 2026-06-30
License #424355· 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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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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Find Well Drillers by City in Contra Costa County

Concord

Pop. 129,295

Antioch

Pop. 115,291

Brentwood

Pop. 65,598

Well Drilling Permits in Contra Costa County

Contra Costa County Environmental Health Division issues well permits. Applications require well design plans and must meet setback distances from potential contamination sources.

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 Contra Costa County

Eastern Contra Costa overlies productive alluvial aquifers in the San Joaquin Delta region. Western areas have more complex geology with marine sediments and volcanic formations that limit groundwater availability.

Frequently Asked Questions About Well Drilling in Contra Costa County

Do I need a permit to drill a well in Contra Costa County?
Yes, a well permit is required before any drilling can begin in Contra Costa County. Contra Costa County Environmental Health Division issues well permits. Applications require well design plans and must meet setback distances from potential contamination sources. 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 Contra Costa County?
Well drilling costs in Contra Costa 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 Contra Costa County?
Wells in Contra Costa County average around 200 feet deep, though actual depth varies with location, geology, and intended use. Eastern Contra Costa overlies productive alluvial aquifers in the San Joaquin Delta region. Western areas have more complex geology with marine sediments and volcanic formations that limit groundwater availability.
How do I find a licensed well driller in Contra Costa County?
You can browse our directory of verified C-57 licensed well drilling contractors serving Contra Costa 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 Contra Costa County?
Water quality from private wells in Contra Costa County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. Contra Costa 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

Alameda County

Bay Area

Solano County

Bay Area

San Joaquin County

Central Valley

Sacramento County

Sacramento Valley

Marin County

Bay Area