⟁ California Well Data field records · 2026 survey

California Well Data › Mendocino County

Mendocino County, California: well depth, water level & drilling cost

✓ 14,944 DWR records · verified 2026-08-14

140 ftmedian well depth
80 ft–200 fttypical depth range
34 ftmedian static water level
10 gpmmedian yield (5,809 tests)

How deep are wells in Mendocino County, California?

The median drilled well depth in Mendocino County is 140 ft, based on 12,013 wells with recorded depths in the state DWR database. Half of all wells fall between 80 ft and 200 ft; 90% are shallower than 260 ft. Wells drilled since 2016 have a median depth of 200 ft.

How much does it cost to drill a well in Mendocino County?

Applying published per-foot rates to the local median depth of 200 ft: drilling and casing alone typically runs $5,000–$13,000; a complete system including pump, pressure tank, and hookup typically runs $12,000–$20,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Mendocino County?

The median static water level is 34 ft below ground surface (middle half of wells: 18 ft–70 ft), from 5,567 measurements.

How much water do wells in Mendocino County produce?

The median tested yield is 10 gpm (middle half: 5 gpm–25 gpm), from 5,809 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 1,319 50–100 ft 2,249 100–150 ft 3,001 150–200 ft 1,964 200–300 ft 2,625 300–400 ft 644 400–600 ft 197 600+ ft 14

Who drills wells in Mendocino County?

Companies by number of wells completed in this county since 2016, per filed well completion reports (California Department of Water Resources).

DrillerWells since 2016
WEEKS DRILLING AND PUMP CO480
FISCH BROS DRILLING470
SUPERIOR PUMP & DRILLING INC273
CASCADE DRILLING L P35
J W MORRISON INC26
VICS WELL DRILLING INC19
CLEAR HEART DRILLING INC17
FISCH DRILLING AND PUMP INC15

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Method: medians computed from DWR records (filed well completion reports, water-supply uses only (destruction, repair and monitoring wells excluded); depths 0–5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.