California Well Data › San Francisco County
San Francisco County, California: well depth, water level & drilling cost
✓ 2,345 DWR records · verified 2026-10-02
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How deep are wells in San Francisco County, California?
The median drilled well depth in San Francisco County is 29 ft, based on 828 wells with recorded depths in the state DWR database. Half of all wells fall between 15 ft and 60 ft; 90% are shallower than 120 ft. Wells drilled since 2016 have a median depth of 29 ft.
How much does it cost to drill a well in San Francisco County?
Applying published per-foot rates to the local median depth of 29 ft: drilling and casing alone typically runs $725–$1,885; a complete system including pump, pressure tank, and hookup typically runs $1,740–$2,900. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in San Francisco County?
The median static water level is 21 ft below ground surface (middle half of wells: 10 ft–31 ft), from 77 measurements.
How much water do wells in San Francisco County produce?
The median tested yield is 650 gpm (middle half: 29 gpm–800 gpm), from 11 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in San Francisco 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 Francisco County
Median depth, water level, and yield for each ZIP code with recorded wells.
- San Francisco (94124) — 409 wells, median 17 ft
- San Francisco (94110) — 228 wells, median 40 ft
- San Francisco (94107) — 162 wells, median 31 ft
- San Francisco (94134) — 155 wells, median 41 ft
- San Francisco (94104) — 121 wells, median 49 ft
- San Francisco (94129) — 118 wells, median 21 ft
- San Francisco (94112) — 103 wells, median 30 ft
- San Francisco (94127) — 67 wells, median 120 ft
- San Francisco (94123) — 67 wells, median 120 ft
- San Francisco (94130) — 67 wells, median 30 ft
- San Francisco (94158) — 64 wells, median 20 ft
- San Francisco (94115) — 58 wells, median 62 ft
- San Francisco (94116) — 53 wells, median 120 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.