⟁ California Well Data field records · 2026 survey

California Well Data › Contra Costa County › Antioch (94531)

Antioch, CA (94531): well depth, water level & drilling cost

✓ 250 DWR records · Contra Costa County

139 ftmedian well depth
80 ft–199 fttypical depth range
30 ftmedian static water level
7 gpmmedian yield (48 tests)

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How deep are wells in and around Antioch (94531), California?

The median drilled well depth in and around Antioch (94531) is 139 ft, based on 190 wells with recorded depths in the state DWR database. Half fall between 80 ft and 199 ft; 90% are shallower than 300 ft.

How much does it cost to drill a well in and around Antioch (94531)?

Applying published per-foot rates to the local median depth of 139 ft: drilling and casing alone typically runs $3,475–$9,035; a complete system including pump, pressure tank, and hookup typically runs $8,340–$13,900. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Antioch (94531)?

The median static water level is 30 ft below ground surface (middle half of wells: 19 ft–54 ft), from 70 measurements.

Drilled depth distribution

0–50 ft 18 50–100 ft 37 100–150 ft 63 150–200 ft 24 200–300 ft 25 300–400 ft 18 400–600 ft 3 600+ ft 2
Looking at a specific property in Antioch (94531)?

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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.