⟁ California Well Data field records · 2026 survey

California Well Data › Contra Costa County › Diablo (94528)

Diablo, CA (94528): well depth, water level & drilling cost

✓ 123 DWR records · Contra Costa County

220 ftmedian well depth
100 ft–345 fttypical depth range
38 ftmedian static water level
13 gpmmedian yield (21 tests)

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How deep are wells in and around Diablo (94528), California?

The median drilled well depth in and around Diablo (94528) is 220 ft, based on 71 wells with recorded depths in the state DWR database. Half fall between 100 ft and 345 ft; 90% are shallower than 450 ft.

How much does it cost to drill a well in and around Diablo (94528)?

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 Diablo (94528)?

The median static water level is 38 ft below ground surface (middle half of wells: 21 ft–60 ft), from 30 measurements.

Drilled depth distribution

0–50 ft 12 50–100 ft 6 100–150 ft 7 150–200 ft 2 200–300 ft 14 300–400 ft 18 400–600 ft 11 600+ ft 1
Looking at a specific property in Diablo (94528)?

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Part of Contra Costa 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.