⟁ California Well Data field records · 2026 survey

California Well Data › San Mateo County › Millbrae (94030)

Millbrae, CA (94030): well depth, water level & drilling cost

✓ 115 DWR records · San Mateo County

58 ftmedian well depth
18 ft–300 fttypical depth range
176 ftmedian static water level
50 gpmmedian yield (6 tests)

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How deep are wells in and around Millbrae (94030), California?

The median drilled well depth in and around Millbrae (94030) is 58 ft, based on 60 wells with recorded depths in the state DWR database. Half fall between 18 ft and 300 ft; 90% are shallower than 378 ft.

How much does it cost to drill a well in and around Millbrae (94030)?

Applying published per-foot rates to the local median depth of 58 ft: drilling and casing alone typically runs $1,450–$3,770; a complete system including pump, pressure tank, and hookup typically runs $3,480–$5,800. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Millbrae (94030)?

The median static water level is 176 ft below ground surface (middle half of wells: 47 ft–251 ft), from 10 measurements.

Drilled depth distribution

0–50 ft 25 50–100 ft 10 100–150 ft 2 150–200 ft 0 200–300 ft 6 300–400 ft 11 400–600 ft 6 600+ ft 0
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Part of San Mateo 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.