⟁ California Well Data field records · 2026 survey

California Well Data › Sonoma County › Petaluma (94999)

Petaluma, CA (94999): well depth, water level & drilling cost

✓ 843 DWR records · Sonoma County

230 ftmedian well depth
175 ft–285 fttypical depth range
53 ftmedian static water level
30 gpmmedian yield (432 tests)

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How deep are wells in and around Petaluma (94999), California?

The median drilled well depth in and around Petaluma (94999) is 230 ft, based on 612 wells with recorded depths in the state DWR database. Half fall between 175 ft and 285 ft; 90% are shallower than 360 ft.

How much does it cost to drill a well in and around Petaluma (94999)?

Applying published per-foot rates to the local median depth of 230 ft: drilling and casing alone typically runs $5,750–$14,950; a complete system including pump, pressure tank, and hookup typically runs $13,800–$23,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Petaluma (94999)?

The median static water level is 53 ft below ground surface (middle half of wells: 31 ft–80 ft), from 389 measurements.

Drilled depth distribution

0–50 ft 41 50–100 ft 30 100–150 ft 40 150–200 ft 85 200–300 ft 276 300–400 ft 99 400–600 ft 35 600+ ft 6
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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.