California Well Data › Mariposa County
Mariposa County, California: well depth, water level & drilling cost
✓ 7,240 DWR records · verified 2026-10-02
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How deep are wells in Mariposa County, California?
The median drilled well depth in Mariposa County is 220 ft, based on 6,104 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.
What is the static water level in Mariposa County?
The median static water level is 40 ft below ground surface (middle half of wells: 29 ft–75 ft), from 2,391 measurements.
How much water do wells in Mariposa County produce?
The median tested yield is 15 gpm (middle half: 6 gpm–32 gpm), from 3,945 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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).
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Well records by ZIP code in Mariposa County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Mariposa (95338) — 3,343 wells, median 220 ft
- Midpines (95345) — 646 wells, median 201 ft
- Catheys Valley (95306) — 626 wells, median 220 ft
- Coulterville (95311) — 545 wells, median 205 ft
- Fish Camp (93623) — 139 wells, median 205 ft
- Hornitos (95325) — 113 wells, median 205 ft
- El Portal (95318) — 102 wells, median 400 ft
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.