⟁ California Well Data field records · 2026 survey

California Well Data › San Luis Obispo County

San Luis Obispo County, California: well depth, water level & drilling cost

✓ 22,599 DWR records · verified 2026-08-14

340 ftmedian well depth
180 ft–500 fttypical depth range
106 ftmedian static water level
50 gpmmedian yield (3,400 tests)

How deep are wells in San Luis Obispo County, California?

The median drilled well depth in San Luis Obispo County is 340 ft, based on 5,509 wells with recorded depths in the state DWR database. Half of all wells fall between 180 ft and 500 ft; 90% are shallower than 690 ft. Wells drilled since 2016 have a median depth of 420 ft.

How much does it cost to drill a well in San Luis Obispo County?

Applying published per-foot rates to the local median depth of 420 ft: drilling and casing alone typically runs $10,500–$27,300; a complete system including pump, pressure tank, and hookup typically runs $25,200–$42,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in San Luis Obispo County?

The median static water level is 106 ft below ground surface (middle half of wells: 42 ft–220 ft), from 4,631 measurements.

How much water do wells in San Luis Obispo County produce?

The median tested yield is 50 gpm (middle half: 20 gpm–100 gpm), from 3,400 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 139 50–100 ft 424 100–150 ft 529 150–200 ft 370 200–300 ft 781 300–400 ft 976 400–600 ft 1,404 600+ ft 886

Who drills wells in San Luis Obispo 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
FILIPPONI-THOMPSON DRILLING INC738
MILLER DRILLING CO346
MAZZI WELL DRILLING172
BUSINESS MIDSTATE DRILLERS87
COAST DRILLING INC57
TAYLOR DRILLING AND PUMP INC30
ALL AMERICAN DRILLING INC30
ENLOE WELL DRILLING27

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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.