⟁ California Well Data field records · 2026 survey

California Well Data › San Bernardino County › Ontario (91761)

Ontario, CA (91761): well depth, water level & drilling cost

✓ 241 DWR records · San Bernardino County

347 ftmedian well depth
286 ft–409 fttypical depth range
140 ftmedian static water level
650 gpmmedian yield (92 tests)

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How deep are wells in and around Ontario (91761), California?

The median drilled well depth in and around Ontario (91761) is 347 ft, based on 219 wells with recorded depths in the state DWR database. Half fall between 286 ft and 409 ft; 90% are shallower than 517 ft.

How much does it cost to drill a well in and around Ontario (91761)?

Applying published per-foot rates to the local median depth of 347 ft: drilling and casing alone typically runs $8,675–$22,555; a complete system including pump, pressure tank, and hookup typically runs $20,820–$34,700. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Ontario (91761)?

The median static water level is 140 ft below ground surface (middle half of wells: 130 ft–200 ft), from 25 measurements.

Drilled depth distribution

0–50 ft 10 50–100 ft 2 100–150 ft 2 150–200 ft 1 200–300 ft 47 300–400 ft 90 400–600 ft 52 600+ ft 15
Looking at a specific property in Ontario (91761)?

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Get quotes from drillers who work in Ontario (91761)

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Part of San Bernardino 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.