⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › ZIP 99320

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

✓ 263 Ecology records · Benton County

240 ftmedian well depth
145 ft–378 fttypical depth range
118 ftmedian static water level
30 gpmmedian yield (132 tests)

How deep are wells in ZIP 99320, Washington?

The median drilled well depth in ZIP 99320 is 240 ft, based on 263 wells with recorded depths in the state Ecology database. Half fall between 145 ft and 378 ft; 90% are shallower than 504 ft.

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

Applying published per-foot rates to the local median depth of 238 ft: drilling and casing alone typically runs $5,950–$15,470; a complete system including pump, pressure tank, and hookup typically runs $14,280–$23,800. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers who work in ZIP 99320

Free for property owners. We route your request only to licensed drillers who actually file well logs in Benton County — never sold elsewhere.

What is the static water level in ZIP 99320?

The median static water level is 118 ft below ground surface (middle half of wells: 52 ft–204 ft), from 135 measurements.

Pull every recorded well near a ZIP 99320 address — $19

Drilled depth distribution

0–50 ft 2 50–100 ft 21 100–150 ft 47 150–200 ft 32 200–300 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.