⟁ California Well Data field records · 2026 survey

California Well Data › Marin County › San Rafael (94912)

San Rafael, CA (94912): well depth, water level & drilling cost

✓ 162 DWR records · Marin County

150 ftmedian well depth
49 ft–222 fttypical depth range
23 ftmedian static water level
3 gpmmedian yield (60 tests)

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How deep are wells in and around San Rafael (94912), California?

The median drilled well depth in and around San Rafael (94912) is 150 ft, based on 84 wells with recorded depths in the state DWR database. Half fall between 49 ft and 222 ft; 90% are shallower than 284 ft.

How much does it cost to drill a well in and around San Rafael (94912)?

Applying published per-foot rates to the local median depth of 150 ft: drilling and casing alone typically runs $3,750–$9,750; a complete system including pump, pressure tank, and hookup typically runs $9,000–$15,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around San Rafael (94912)?

The median static water level is 23 ft below ground surface (middle half of wells: 12 ft–49 ft), from 46 measurements.

Drilled depth distribution

0–50 ft 23 50–100 ft 7 100–150 ft 11 150–200 ft 12 200–300 ft 23 300–400 ft 6 400–600 ft 1 600+ ft 1
Looking at a specific property in San Rafael (94912)?

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Part of Marin 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.