⟁ California Well Data field records · 2026 survey

California Well Data › Tuolumne County

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

✓ 5,863 DWR records · verified 2026-08-14

350 ftmedian well depth
200 ft–550 fttypical depth range
55 ftmedian static water level
18 gpmmedian yield (1,872 tests)

How deep are wells in Tuolumne County, California?

The median drilled well depth in Tuolumne County is 350 ft, based on 5,015 wells with recorded depths in the state DWR database. Half of all wells fall between 200 ft and 550 ft; 90% are shallower than 775 ft. Wells drilled since 2016 have a median depth of 580 ft.

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

Applying published per-foot rates to the local median depth of 580 ft: drilling and casing alone typically runs $14,500–$37,700; a complete system including pump, pressure tank, and hookup typically runs $34,800–$58,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Tuolumne County?

The median static water level is 55 ft below ground surface (middle half of wells: 30 ft–100 ft), from 1,080 measurements.

How much water do wells in Tuolumne County produce?

The median tested yield is 18 gpm (middle half: 7 gpm–40 gpm), from 1,872 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 71 50–100 ft 212 100–150 ft 374 150–200 ft 431 200–300 ft 827 300–400 ft 842 400–600 ft 1,146 600+ ft 1,112

Who drills wells in Tuolumne 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
CANEPA AND SONS INC242
TANKO BROS INC86
CASCADE DRILLING L P7
ALL WELL ABANDONMENT4
WELL INDUSTRIES INC2
CONETEC INC2
YOSEMITE FALLS INC1

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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.