Well Drillers in Mariposa County, California

Mariposa County in the Sierra Nevada foothills includes the western entrance to Yosemite National Park. With no incorporated cities, virtually all development relies on private wells. Well drilling serves homesteads, ranches, and small communities throughout the county.

Licensed Contractors

9

Avg. Well Depth

~300 ft

County Seat

Mariposa

Licensed C-57 Contractors in Mariposa 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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CR INDUSTRIES

Active
KERMAN, CA 93630
(559) 846 5531
Expires: 2027-06-30
License #1054971· Verified Active C-57Services your area
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HANSEN-WELLDO-SERVICE INC

Active
OAK VIEW, CA 93022
(805) 646 4802
Expires: 2027-06-30
License #707975· Verified Active C-57Services your area
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HP WATER SYSTEMS INC

Active
FRESNO, CA 93706
(559) 268 4751
Expires: 2027-03-31
License #701818· Verified Active C-57Services your area
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J V H WELL & SEPTIC INC

Active
CLOVIS, CA 93611
(559) 301 0222
Expires: 2026-04-30
License #1090773· Verified Active C-57Services your area
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TANKO BROS INC

Active
SONORA, CA 95370
(209) 532 7797
Expires: 2026-11-30
License #395633· Verified Active C-57Services your area
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WALT BANNON DRILLING INC

Active
OAKHURST, CA 93644
(559) 683 5670
Expires: 2026-11-30
License #606385· Verified Active C-57Services your area
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WELLCO DRILLING INC

Active
RAYMOND, CA 93653
(559) 689 3454
Expires: 2027-05-31
License #567099· Verified Active C-57Services your area
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YOSEMITE FALLS INC

Active
MARIPOSA, CA 95338
(209) 966 4461
Expires: 2026-06-30
License #691117· Verified Active C-57Services your area
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Well Drilling Permits in Mariposa County

Mariposa County Health Department issues well permits. The mountainous terrain and limited road access in some areas can affect drilling logistics. Site evaluations are recommended before permit applications.

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 Mariposa County

Sierra Nevada foothills geology includes metamorphic rocks of the Western Metamorphic Belt and granitic intrusions. Groundwater is found in fracture systems, and yields depend on local structural geology. Some areas have serpentine soils with naturally occurring chromium.

Frequently Asked Questions About Well Drilling in Mariposa County

Do I need a permit to drill a well in Mariposa County?
Yes, a well permit is required before any drilling can begin in Mariposa County. Mariposa County Health Department issues well permits. The mountainous terrain and limited road access in some areas can affect drilling logistics. Site evaluations are recommended before permit applications. 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 Mariposa County?
Well drilling costs in Mariposa 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 300 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 Mariposa County?
Wells in Mariposa County average around 300 feet deep, though actual depth varies with location, geology, and intended use. Sierra Nevada foothills geology includes metamorphic rocks of the Western Metamorphic Belt and granitic intrusions. Groundwater is found in fracture systems, and yields depend on local structural geology. Some areas have serpentine soils with naturally occurring chromium.
How do I find a licensed well driller in Mariposa County?
You can browse our directory of verified C-57 licensed well drilling contractors serving Mariposa 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 Mariposa County?
Water quality from private wells in Mariposa County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. Mariposa 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

Madera County

Central Valley

Tuolumne County

Sierra Nevada

Merced County

Central Valley

Stanislaus County

Central Valley