⟁ California Well Data field records · 2026 survey

California Well Data › Sonoma County › Cotati (94931)

Cotati, CA (94931): well depth, water level & drilling cost

✓ 1,281 DWR records · Sonoma County

245 ftmedian well depth
180 ft–304 fttypical depth range
52 ftmedian static water level
20 gpmmedian yield (708 tests)

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How deep are wells in and around Cotati (94931), California?

The median drilled well depth in and around Cotati (94931) is 245 ft, based on 1,000 wells with recorded depths in the state DWR database. Half fall between 180 ft and 304 ft; 90% are shallower than 390 ft.

How much does it cost to drill a well in and around Cotati (94931)?

Applying published per-foot rates to the local median depth of 245 ft: drilling and casing alone typically runs $6,125–$15,925; a complete system including pump, pressure tank, and hookup typically runs $14,700–$24,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Cotati (94931)?

The median static water level is 52 ft below ground surface (middle half of wells: 32 ft–80 ft), from 641 measurements.

Drilled depth distribution

0–50 ft 33 50–100 ft 48 100–150 ft 72 150–200 ft 161 200–300 ft 405 300–400 ft 191 400–600 ft 79 600+ ft 11
Looking at a specific property in Cotati (94931)?

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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.