⟁ California Well Data field records · 2026 survey

California Well Data › San Bernardino County › Ontario (91758)

Ontario, CA (91758): well depth, water level & drilling cost

✓ 92 DWR records · San Bernardino County

30 ftmedian well depth
25 ft–150 fttypical depth range
313 ftmedian static water level
2,590 gpmmedian yield (9 tests)

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How deep are wells in and around Ontario (91758), California?

The median drilled well depth in and around Ontario (91758) is 30 ft, based on 73 wells with recorded depths in the state DWR database. Half fall between 25 ft and 150 ft; 90% are shallower than 1,010 ft.

How much does it cost to drill a well in and around Ontario (91758)?

Applying published per-foot rates to the local median depth of 30 ft: drilling and casing alone typically runs $750–$1,950; a complete system including pump, pressure tank, and hookup typically runs $1,800–$3,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Ontario (91758)?

The median static water level is 313 ft below ground surface (middle half of wells: 313 ft–313 ft), from 1 measurements.

Drilled depth distribution

0–50 ft 40 50–100 ft 6 100–150 ft 8 150–200 ft 3 200–300 ft 0 300–400 ft 3 400–600 ft 1 600+ ft 12
Looking at a specific property in Ontario (91758)?

See every recorded well near any address — depths, water levels, yields, original driller's logs — in a one-time report.

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Get quotes from drillers who work in Ontario (91758)

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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.