Well Drillers in Mendocino County, California
Mendocino County stretches from the rugged Pacific coastline through coastal ranges to inland valleys. Private wells are the primary water source for most of the county outside of Ukiah and Fort Bragg, serving farms, vineyards, and rural homes throughout the region.
Licensed Contractors
12
Avg. Well Depth
~150 ft
County Seat
Ukiah
Licensed C-57 Contractors in Mendocino County
CLARKE DRILLING
ActiveCOVELO, CA 95428
(707) 354 3937
Expires: 2026-12-31
License #956069· Verified Active C-57Services your area
View Details →CLEAR HEART DRILLING INC
ActiveSANTA ROSA, CA 95401
(707) 568 6095
Expires: 2026-06-30
License #780357· Verified Active C-57Services your area
View Details →COASTAL WELL CLEANING
ActiveFORT BRAGG, CA 95437
(707) 964 5939
Expires: 2028-01-31
License #724784· Verified Active C-57Services your area
View Details →FISCH BROS DRILLING
ActiveSEBASTOPOL, CA 95472
(707) 823 3891
Expires: 2027-02-28
License #399226· Verified Active C-57Services your area
View Details →IRWIN WELL DRILLING INC
ActiveFULTON, CA 95439
(707) 303 5984
Expires: 2027-02-28
License #891725· Verified Active C-57Services your area
View Details →JERRY AND DON'S YAGER PUMP AND WELL SERVICE
ActivePETALUMA, CA 94953
(707) 762 1473
Expires: 2026-08-31
License #424778· Verified Active C-57Services your area
View Details →OASIS PUMP & DRILLING
ActivePETALUMA, CA 94952
(707) 762 4028
Expires: 2026-08-31
License #242168· Verified Active C-57Services your area
View Details →RICH WELL & PUMP SERVICE
ActiveMC KINLEYVILLE, CA 95519
(707) 839 1087
Expires: 2026-08-31
License #1125550· Verified Active C-57Services your area
View Details →RICH WELL DRILLING & PUMP SERVICE INC
ActiveMC KINLEYVILLE, CA 95519
(707) 839 1087
Expires: 2027-08-31
License #902702· Verified Active C-57Services your area
View Details →SUPERIOR PUMP & DRILLING INC
ActiveFORT BRAGG, CA 95437
(707) 964 9511
Expires: 2027-11-30
License #495399· Verified Active C-57Services your area
View Details →UNITED DRILLING
ActiveFORT BRAGG, CA 95437
(707) 964 4718
Expires: 2027-03-31
License #558663· Verified Active C-57Services your area
View Details →WEEKS DRILLING AND PUMP CO
ActiveSEBASTOPOL, CA 95473
(707) 823 3184
Expires: 2026-09-30
License #177681· Verified Active C-57Services your area
View Details →Find Well Drillers by City in Mendocino County
Well Drilling Permits in Mendocino County
Mendocino County Division of Environmental Health handles well permits. Coastal zone wells and wells in cannabis cultivation areas may have additional requirements. Water availability assessments may be required in some areas.
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 Mendocino County
Complex geology includes Franciscan Complex along the coast, with inland valleys filled by alluvial deposits. The Ukiah and Round Valleys have the most productive aquifers. Coastal areas and ridgetops have limited groundwater with low-yield fractured rock wells.
Frequently Asked Questions About Well Drilling in Mendocino County
Do I need a permit to drill a well in Mendocino County?
Yes, a well permit is required before any drilling can begin in Mendocino County. Mendocino County Division of Environmental Health handles well permits. Coastal zone wells and wells in cannabis cultivation areas may have additional requirements. Water availability assessments may be required in some areas. 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 Mendocino County?
Well drilling costs in Mendocino 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 Mendocino County?
Wells in Mendocino County average around 150 feet deep, though actual depth varies with location, geology, and intended use. Complex geology includes Franciscan Complex along the coast, with inland valleys filled by alluvial deposits. The Ukiah and Round Valleys have the most productive aquifers. Coastal areas and ridgetops have limited groundwater with low-yield fractured rock wells.
How do I find a licensed well driller in Mendocino County?
You can browse our directory of verified C-57 licensed well drilling contractors serving Mendocino 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 Mendocino County?
Water quality from private wells in Mendocino County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. Mendocino County Environmental Health can provide guidance on recommended testing. California does not regulate private well water quality, so testing is the homeowner's responsibility.