California Well Data › San Joaquin County
San Joaquin County, California: well depth, water level & drilling cost
✓ 21,729 DWR records · verified 2026-08-14
How deep are wells in San Joaquin County, California?
The median drilled well depth in San Joaquin County is 235 ft, based on 16,781 wells with recorded depths in the state DWR database. Half of all wells fall between 160 ft and 302 ft; 90% are shallower than 420 ft. Wells drilled since 2016 have a median depth of 300 ft.
How much does it cost to drill a well in San Joaquin County?
Applying published per-foot rates to the local median depth of 300 ft: drilling and casing alone typically runs $7,500–$19,500; a complete system including pump, pressure tank, and hookup typically runs $18,000–$30,000. Actual quotes depend on site access, geology, and casing requirements.
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What is the static water level in San Joaquin County?
The median static water level is 66 ft below ground surface (middle half of wells: 32 ft–100 ft), from 4,778 measurements.
How much water do wells in San Joaquin County produce?
The median tested yield is 200 gpm (middle half: 100 gpm–1,200 gpm), from 1,165 pump tests. A typical household needs 5–10 gpm.
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Drilled depth distribution
Who drills wells in San Joaquin 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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See every recorded well near any address — depths, water levels, yields, original driller's logs — in a one-time report.
Free lookup Property report — $29Method: 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.