Well Drillers in Lake County, California

Lake County is named for Clear Lake, the largest natural freshwater lake entirely within California. Rural properties throughout the county rely on private wells, with drilling activity common around Lakeport, Clearlake, Middletown, and Upper Lake.

Licensed Contractors

5

Avg. Well Depth

~150 ft

County Seat

Lakeport

Licensed C-57 Contractors in Lake County

CARUSO D DRILLING AND WELL SERVICE

Active
CLEARLAKE, CA 95422
(707) 533 3086
Expires: 2027-10-31
License #1082813· 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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FISCH BROS DRILLING

Active
SEBASTOPOL, CA 95472
(707) 823 3891
Expires: 2027-02-28
License #399226· Verified Active C-57Services your area
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PETERSON WILL WELL DRILLING

Active
KELSEYVILLE, CA 95451
(707) 277 0103
Expires: 2027-02-12
License #1009053· Verified Active C-57Services your area
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WEEKS DRILLING AND PUMP CO

Active
SEBASTOPOL, CA 95473
(707) 823 3184
Expires: 2026-09-30
License #177681· Verified Active C-57Services your area
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Find Well Drillers by City in Lake County

Clearlake

Pop. 15,542

Lakeport

Pop. 4,997

Well Drilling Permits in Lake County

Lake County Environmental Health issues well permits. The county has specific requirements near Clear Lake and in geothermal areas. Water quality testing is required for new domestic wells.

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 Lake County

Volcanic geology creates diverse groundwater conditions. Areas near The Geysers geothermal field have elevated temperatures and mineral content. Clear Lake basin sediments provide productive aquifers in the valley areas, while volcanic uplands have fractured rock aquifers.

Frequently Asked Questions About Well Drilling in Lake County

Do I need a permit to drill a well in Lake County?
Yes, a well permit is required before any drilling can begin in Lake County. Lake County Environmental Health issues well permits. The county has specific requirements near Clear Lake and in geothermal areas. Water quality testing is required for new domestic wells. 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 Lake County?
Well drilling costs in Lake 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 150 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 Lake County?
Wells in Lake County average around 150 feet deep, though actual depth varies with location, geology, and intended use. Volcanic geology creates diverse groundwater conditions. Areas near The Geysers geothermal field have elevated temperatures and mineral content. Clear Lake basin sediments provide productive aquifers in the valley areas, while volcanic uplands have fractured rock aquifers.
How do I find a licensed well driller in Lake County?
You can browse our directory of verified C-57 licensed well drilling contractors serving Lake 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 Lake County?
Water quality from private wells in Lake County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. Lake 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

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Northern California

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Northern California