⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Asotin County › ZIP 99402

ZIP 99402, Asotin County: well depth, water level & drilling cost

✓ 136 Ecology records · Asotin County

180 ftmedian well depth
127 ft–303 fttypical depth range
82 ftmedian static water level
20 gpmmedian yield (39 tests)

How deep are wells in ZIP 99402, Washington?

The median drilled well depth in ZIP 99402 is 180 ft, based on 136 wells with recorded depths in the state Ecology database. Half fall between 127 ft and 303 ft; 90% are shallower than 565 ft.

How much does it cost to drill a well in ZIP 99402?

Applying published per-foot rates to the local median depth of 180 ft: drilling and casing alone typically runs $4,500–$11,700; a complete system including pump, pressure tank, and hookup typically runs $10,800–$18,000. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers who work in ZIP 99402

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

What is the static water level in ZIP 99402?

The median static water level is 82 ft below ground surface (middle half of wells: 47 ft–170 ft), from 36 measurements.

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Drilled depth distribution

0–50 ft 2 50–100 ft 15 100–150 ft 28 150–200 ft 28 200–300 ft 26 300–400 ft 11 400–600 ft 12 600+ ft 14
Looking at a specific property in ZIP 99402?

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Part of Asotin 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.