⟁ California Well Data field records · 2026 survey

California Well Data › Marin County › Fairfax (94978)

Fairfax, CA (94978): well depth, water level & drilling cost

✓ 71 DWR records · Marin County

100 ftmedian well depth
45 ft–140 fttypical depth range
14 ftmedian static water level
12 gpmmedian yield (21 tests)

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How deep are wells in and around Fairfax (94978), California?

The median drilled well depth in and around Fairfax (94978) is 100 ft, based on 29 wells with recorded depths in the state DWR database. Half fall between 45 ft and 140 ft; 90% are shallower than 180 ft.

How much does it cost to drill a well in and around Fairfax (94978)?

Applying published per-foot rates to the local median depth of 100 ft: drilling and casing alone typically runs $2,500–$6,500; a complete system including pump, pressure tank, and hookup typically runs $6,000–$10,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Fairfax (94978)?

The median static water level is 14 ft below ground surface (middle half of wells: 10 ft–20 ft), from 17 measurements.

Drilled depth distribution

0–50 ft 11 50–100 ft 3 100–150 ft 8 150–200 ft 4 200–300 ft 0 300–400 ft 3 400–600 ft 0 600+ ft 0
Looking at a specific property in Fairfax (94978)?

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Get quotes from drillers who work in Fairfax (94978)

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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.