⟁ California Well Data field records · 2026 survey

California Well Data › San Mateo County › San Francisco (94128)

San Francisco, CA (94128): well depth, water level & drilling cost

✓ 84 DWR records · San Mateo County

22 ftmedian well depth
14 ft–58 fttypical depth range
9 ftmedian static water level
50 gpmmedian yield (1 tests)

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How deep are wells in and around San Francisco (94128), California?

The median drilled well depth in and around San Francisco (94128) is 22 ft, based on 51 wells with recorded depths in the state DWR database. Half fall between 14 ft and 58 ft; 90% are shallower than 190 ft.

How much does it cost to drill a well in and around San Francisco (94128)?

Applying published per-foot rates to the local median depth of 22 ft: drilling and casing alone typically runs $550–$1,430; a complete system including pump, pressure tank, and hookup typically runs $1,320–$2,200. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around San Francisco (94128)?

The median static water level is 9 ft below ground surface (middle half of wells: 7 ft–13 ft), from 19 measurements.

Drilled depth distribution

0–50 ft 33 50–100 ft 10 100–150 ft 1 150–200 ft 2 200–300 ft 2 300–400 ft 1 400–600 ft 2 600+ ft 0
Looking at a specific property in San Francisco (94128)?

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Get quotes from drillers who work in San Francisco (94128)

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Part of San Mateo County well records.

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), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.