⟁ California Well Data field records · 2026 survey

California Well Data › Marin County › Marshall (94940)

Marshall, CA (94940): well depth, water level & drilling cost

✓ 96 DWR records · Marin County

120 ftmedian well depth
59 ft–260 fttypical depth range
28 ftmedian static water level
10 gpmmedian yield (53 tests)

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How deep are wells in and around Marshall (94940), California?

The median drilled well depth in and around Marshall (94940) is 120 ft, based on 79 wells with recorded depths in the state DWR database. Half fall between 59 ft and 260 ft; 90% are shallower than 329 ft.

How much does it cost to drill a well in and around Marshall (94940)?

Applying published per-foot rates to the local median depth of 120 ft: drilling and casing alone typically runs $3,000–$7,800; a complete system including pump, pressure tank, and hookup typically runs $7,200–$12,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Marshall (94940)?

The median static water level is 28 ft below ground surface (middle half of wells: 18 ft–115 ft), from 45 measurements.

Drilled depth distribution

0–50 ft 18 50–100 ft 16 100–150 ft 9 150–200 ft 6 200–300 ft 18 300–400 ft 9 400–600 ft 3 600+ ft 0
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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.