⟁ California Well Data field records · 2026 survey

California Well Data › Sonoma County › Sonoma (95476)

Sonoma, CA (95476): well depth, water level & drilling cost

✓ 507 DWR records · Sonoma County

220 ftmedian well depth
84 ft–400 fttypical depth range
40 ftmedian static water level
40 gpmmedian yield (234 tests)

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How deep are wells in and around Sonoma (95476), California?

The median drilled well depth in and around Sonoma (95476) is 220 ft, based on 379 wells with recorded depths in the state DWR database. Half fall between 84 ft and 400 ft; 90% are shallower than 570 ft.

How much does it cost to drill a well in and around Sonoma (95476)?

Applying published per-foot rates to the local median depth of 220 ft: drilling and casing alone typically runs $5,500–$14,300; a complete system including pump, pressure tank, and hookup typically runs $13,200–$22,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Sonoma (95476)?

The median static water level is 40 ft below ground surface (middle half of wells: 21 ft–70 ft), from 206 measurements.

Drilled depth distribution

0–50 ft 54 50–100 ft 57 100–150 ft 30 150–200 ft 30 200–300 ft 58 300–400 ft 48 400–600 ft 78 600+ ft 24
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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.