California Well Data › San Luis Obispo County
San Luis Obispo County, California: well depth, water level & drilling cost
✓ 22,606 DWR records · verified 2026-10-02
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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 5,516 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.
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 4,638 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 3,407 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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).
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Well records by ZIP code in San Luis Obispo County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Paso Robles (93446) — 3,525 wells, median 440 ft
- Templeton (93465) — 2,380 wells, median 390 ft
- Atascadero (93422) — 1,622 wells, median 325 ft
- Nipomo (93444) — 1,550 wells, median 400 ft
- Creston (93432) — 1,146 wells, median 395 ft
- Paso Robles (93447) — 1,037 wells, median 500 ft
- Arroyo Grande (93421) — 1,017 wells, median 290 ft
- San Luis Obispo (93409) — 969 wells, median 240 ft
- Shandon (93461) — 598 wells, median 465 ft
- Bradley (93426) — 579 wells, median 294 ft
- San Luis Obispo (93410) — 519 wells, median 300 ft
- San Luis Obispo (93401) — 507 wells, median 108 ft
- Oceano (93445) — 481 wells, median 350 ft
- Arroyo Grande (93420) — 478 wells, median 130 ft
- Los Osos (93412) — 408 wells, median 145 ft
- Avila Beach (93424) — 373 wells, median 140 ft
- San Luis Obispo (93405) — 363 wells, median 140 ft
- Cayucos (93430) — 363 wells, median 180 ft
- Cambria (93428) — 345 wells, median 238 ft
- Harmony (93435) — 263 wells, median 180 ft
- Pismo Beach (93448) — 255 wells, median 500 ft
- Atascadero (93423) — 243 wells, median 160 ft
- Santa Margarita (93453) — 230 wells, median 240 ft
- Los Osos (93402) — 194 wells, median 88 ft
- Oceano (93475) — 178 wells, median 350 ft
- San Luis Obispo (93403) — 167 wells, median 83 ft
- Morro Bay (93442) — 125 wells, median 76 ft
- Grover Beach (93433) — 106 wells, median 300 ft
- San Simeon (93452) — 88 wells, median 160 ft
- Pismo Beach (93449) — 86 wells, median 365 ft
- Morro Bay (93443) — 70 wells, median 78 ft
- Grover Beach (93483) — 63 wells, median —
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.