⟁ California Well Data field records · 2026 survey

California Well Data › Contra Costa County › Antioch (94509)

Antioch, CA (94509): well depth, water level & drilling cost

✓ 714 DWR records · Contra Costa County

80 ftmedian well depth
40 ft–125 fttypical depth range
35 ftmedian static water level
55 gpmmedian yield (24 tests)

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How deep are wells in and around Antioch (94509), California?

The median drilled well depth in and around Antioch (94509) is 80 ft, based on 347 wells with recorded depths in the state DWR database. Half fall between 40 ft and 125 ft; 90% are shallower than 234 ft.

How much does it cost to drill a well in and around Antioch (94509)?

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 Antioch (94509)?

The median static water level is 35 ft below ground surface (middle half of wells: 15 ft–50 ft), from 53 measurements.

Drilled depth distribution

0–50 ft 125 50–100 ft 87 100–150 ft 69 150–200 ft 23 200–300 ft 16 300–400 ft 6 400–600 ft 18 600+ ft 3
Looking at a specific property in Antioch (94509)?

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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.