⟁ California Well Data field records · 2026 survey

California Well Data › Sonoma County › Santa Rosa (95402)

Santa Rosa, CA (95402): well depth, water level & drilling cost

✓ 409 DWR records · Sonoma County

120 ftmedian well depth
64 ft–218 fttypical depth range
28 ftmedian static water level
25 gpmmedian yield (161 tests)

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How deep are wells in and around Santa Rosa (95402), California?

The median drilled well depth in and around Santa Rosa (95402) is 120 ft, based on 274 wells with recorded depths in the state DWR database. Half fall between 64 ft and 218 ft; 90% are shallower than 330 ft.

How much does it cost to drill a well in and around Santa Rosa (95402)?

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 Santa Rosa (95402)?

The median static water level is 28 ft below ground surface (middle half of wells: 15 ft–60 ft), from 166 measurements.

Drilled depth distribution

0–50 ft 43 50–100 ft 65 100–150 ft 51 150–200 ft 35 200–300 ft 40 300–400 ft 17 400–600 ft 7 600+ ft 16
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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.