⟁ California Well Data field records · 2026 survey

California Well Data › Sonoma County › Duncans Mills (95430)

Duncans Mills, CA (95430): well depth, water level & drilling cost

✓ 110 DWR records · Sonoma County

70 ftmedian well depth
39 ft–125 fttypical depth range
22 ftmedian static water level
17 gpmmedian yield (44 tests)

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How deep are wells in and around Duncans Mills (95430), California?

The median drilled well depth in and around Duncans Mills (95430) is 70 ft, based on 83 wells with recorded depths in the state DWR database. Half fall between 39 ft and 125 ft; 90% are shallower than 174 ft.

How much does it cost to drill a well in and around Duncans Mills (95430)?

Applying published per-foot rates to the local median depth of 70 ft: drilling and casing alone typically runs $1,750–$4,550; a complete system including pump, pressure tank, and hookup typically runs $4,200–$7,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Duncans Mills (95430)?

The median static water level is 22 ft below ground surface (middle half of wells: 15 ft–61 ft), from 47 measurements.

Drilled depth distribution

0–50 ft 32 50–100 ft 19 100–150 ft 21 150–200 ft 5 200–300 ft 3 300–400 ft 1 400–600 ft 1 600+ ft 1
Looking at a specific property in Duncans Mills (95430)?

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Part of Sonoma 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.