California Well Data › Lake County
Lake County, California: well depth, water level & drilling cost
✓ 6,521 DWR records · verified 2026-10-02
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How deep are wells in Lake County, California?
The median drilled well depth in Lake County is 120 ft, based on 6,451 wells with recorded depths in the state DWR database. Half of all wells fall between 70 ft and 205 ft; 90% are shallower than 305 ft. Wells drilled since 2016 have a median depth of 200 ft.
How much does it cost to drill a well in Lake County?
Applying published per-foot rates to the local median depth of 200 ft: drilling and casing alone typically runs $5,000–$13,000; a complete system including pump, pressure tank, and hookup typically runs $12,000–$20,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Lake County?
The median static water level is 54 ft below ground surface (middle half of wells: 23 ft–105 ft), from 474 measurements.
How much water do wells in Lake County produce?
The median tested yield is 30 gpm (middle half: 11 gpm–60 gpm), from 2,598 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Lake County?
Companies by number of wells completed in this county since 2016, per filed well completion reports (California Department of Water Resources).
| Driller | Wells since 2016 |
|---|---|
| WILL PETERSON WELL DRILLING | 162 |
| WEEKS DRILLING AND PUMP CO | 113 |
| JAK DRILLING AND PUMP | 61 |
| HUTTON WELL DRILLING | 20 |
| WELL INDUSTRIES INC | 14 |
| FISCH BROS DRILLING | 14 |
| MAGGIORA BROS DRILLING INC | 13 |
| FISCH DRILLING AND PUMP INC | 11 |
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Well records by ZIP code in Lake County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Finley (95435) — 1,061 wells, median 108 ft
- Lakeport (95453) — 859 wells, median 115 ft
- Lower Lake (95457) — 627 wells, median 125 ft
- Hidden Valley Lake (95467) — 599 wells, median 200 ft
- Upper Lake (95485) — 571 wells, median 98 ft
- Kelseyville (95451) — 497 wells, median 200 ft
- Middletown (95461) — 357 wells, median 155 ft
- Cobb (95426) — 312 wells, median 160 ft
- Clearlake (95422) — 312 wells, median 90 ft
- Clearlake Oaks (95423) — 261 wells, median 150 ft
- Nice (95464) — 238 wells, median 74 ft
- Witter Springs (95493) — 219 wells, median 77 ft
- Glenhaven (95443) — 132 wells, median 167 ft
- Clearlake Park (95424) — 116 wells, median 156 ft
- Rumsey (95679) — 94 wells, median 189 ft
- Lucerne (95458) — 79 wells, median 96 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.