This page lists licensed or relevant well drillers serving Mendocino, California. It includes contractor names, contact information, service areas, maps, FAQs, and links to related city and driller pages. This page currently includes 12 contractor listings.

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

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Drillers servicing Mendocino County

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.

Well Guides & Resources

Research well drilling before hiring. Our guides cover costs, permits, depth, and timelines.

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.

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