⟁ California Well Data field records · 2026 survey

California Well Data › San Diego County › San Marcos (92078)

San Marcos, CA (92078): well depth, water level & drilling cost

✓ 93 DWR records · San Diego County

480 ftmedian well depth
275 ft–815 fttypical depth range
130 ftmedian static water level
75 gpmmedian yield (63 tests)

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How deep are wells in and around San Marcos (92078), California?

The median drilled well depth in and around San Marcos (92078) is 480 ft, based on 85 wells with recorded depths in the state DWR database. Half fall between 275 ft and 815 ft; 90% are shallower than 1,138 ft.

How much does it cost to drill a well in and around San Marcos (92078)?

Applying published per-foot rates to the local median depth of 480 ft: drilling and casing alone typically runs $12,000–$31,200; a complete system including pump, pressure tank, and hookup typically runs $28,800–$48,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around San Marcos (92078)?

The median static water level is 130 ft below ground surface (middle half of wells: 65 ft–190 ft), from 28 measurements.

Drilled depth distribution

0–50 ft 2 50–100 ft 1 100–150 ft 3 150–200 ft 7 200–300 ft 10 300–400 ft 8 400–600 ft 17 600+ ft 37
Looking at a specific property in San Marcos (92078)?

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Part of San Diego 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.