⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › Kennewick (99338)

Kennewick, WA (99338): well depth, water level & drilling cost

✓ 77 Ecology records · Benton County

345 ftmedian well depth
174 ft–720 fttypical depth range
296 ftmedian static water level
30 gpmmedian yield (55 tests)

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How deep are wells in Kennewick (99338), Washington?

The median drilled well depth in Kennewick (99338) is 345 ft, based on 77 wells with recorded depths in the state Ecology database. Half fall between 174 ft and 720 ft; 90% are shallower than 1,075 ft.

How much does it cost to drill a well in Kennewick (99338)?

Applying published per-foot rates to the local median depth of 345 ft: drilling and casing alone typically runs $8,625–$22,425; a complete system including pump, pressure tank, and hookup typically runs $20,700–$34,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Kennewick (99338)?

The median static water level is 296 ft below ground surface (middle half of wells: 105 ft–587 ft), from 56 measurements.

Drilled depth distribution

0–50 ft 0 50–100 ft 3 100–150 ft 14 150–200 ft 9 200–300 ft 8 300–400 ft 5 400–600 ft 13 600+ ft 25
Looking at a specific property in Kennewick (99338)?

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Part of Benton County well records.

Method: medians computed from Ecology records (water wells only — soil/environmental borings and decommissions 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.