⟁ California Well Data field records · 2026 survey

California Well Data › Los Angeles County › Walnut (91789)

Walnut, CA (91789): well depth, water level & drilling cost

✓ 91 DWR records · Los Angeles County

80 ftmedian well depth
68 ft–108 fttypical depth range
26 ftmedian static water level
180 gpmmedian yield (7 tests)

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How deep are wells in and around Walnut (91789), California?

The median drilled well depth in and around Walnut (91789) is 80 ft, based on 57 wells with recorded depths in the state DWR database. Half fall between 68 ft and 108 ft; 90% are shallower than 170 ft.

How much does it cost to drill a well in and around Walnut (91789)?

Applying published per-foot rates to the local median depth of 80 ft: drilling and casing alone typically runs $2,000–$5,200; a complete system including pump, pressure tank, and hookup typically runs $4,800–$8,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Walnut (91789)?

The median static water level is 26 ft below ground surface (middle half of wells: 25 ft–29 ft), from 3 measurements.

Drilled depth distribution

0–50 ft 7 50–100 ft 33 100–150 ft 8 150–200 ft 4 200–300 ft 1 300–400 ft 2 400–600 ft 2 600+ ft 0
Looking at a specific property in Walnut (91789)?

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Part of Los Angeles 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.