⟁ California Well Data field records · 2026 survey

California Well Data › Mariposa County

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

✓ 7,236 DWR records · verified 2026-08-14

220 ftmedian well depth
150 ft–345 fttypical depth range
40 ftmedian static water level
15 gpmmedian yield (3,941 tests)

How deep are wells in Mariposa County, California?

The median drilled well depth in Mariposa County is 220 ft, based on 6,100 wells with recorded depths in the state DWR database. Half of all wells fall between 150 ft and 345 ft; 90% are shallower than 540 ft. Wells drilled since 2016 have a median depth of 401 ft.

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

Applying published per-foot rates to the local median depth of 401 ft: drilling and casing alone typically runs $10,025–$26,065; a complete system including pump, pressure tank, and hookup typically runs $24,060–$40,100. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Mariposa County?

The median static water level is 40 ft below ground surface (middle half of wells: 28 ft–75 ft), from 2,389 measurements.

How much water do wells in Mariposa County produce?

The median tested yield is 15 gpm (middle half: 6 gpm–32 gpm), from 3,941 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 65 50–100 ft 336 100–150 ft 1,047 150–200 ft 879 200–300 ft 1,698 300–400 ft 831 400–600 ft 766 600+ ft 478

Who drills wells in Mariposa 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
YOSEMITE FALLS INC339
WELLCO DRILLING INC75
WALT BANNON DRILLING INC27
TANKO BROS INC18
CANEPA AND SONS INC14
MARIPOSA WELL DRILLING COMPANY INC11
YOSEMITE FALLS WELL DRILLING1
ATWATER WELL DRILLING1

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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.