⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › ZIP 99320

ZIP 99320, Benton County: well depth, water level & drilling cost

✓ 265 Ecology records · Benton County

239 ftmedian well depth
145 ft–375 fttypical depth range
117 ftmedian static water level
30 gpmmedian yield (132 tests)

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How deep are wells in ZIP 99320, Washington?

The median drilled well depth in ZIP 99320 is 239 ft, based on 265 wells with recorded depths in the state Ecology database. Half fall between 145 ft and 375 ft; 90% are shallower than 503 ft.

How much does it cost to drill a well in ZIP 99320?

Applying published per-foot rates to the local median depth of 239 ft: drilling and casing alone typically runs $5,975–$15,535; a complete system including pump, pressure tank, and hookup typically runs $14,340–$23,900. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in ZIP 99320?

The median static water level is 117 ft below ground surface (middle half of wells: 53 ft–203 ft), from 137 measurements.

Drilled depth distribution

0–50 ft 2 50–100 ft 21 100–150 ft 48 150–200 ft 33 200–300 ft 55 300–400 ft 49 400–600 ft 44 600+ ft 13
Looking at a specific property in ZIP 99320?

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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.