⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Asotin County › ZIP 99403

ZIP 99403, Asotin County: well depth, water level & drilling cost

✓ 146 Ecology records · Asotin County

365 ftmedian well depth
243 ft–513 fttypical depth range
225 ftmedian static water level
25 gpmmedian yield (54 tests)

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How deep are wells in ZIP 99403, Washington?

The median drilled well depth in ZIP 99403 is 365 ft, based on 146 wells with recorded depths in the state Ecology database. Half fall between 243 ft and 513 ft; 90% are shallower than 829 ft.

How much does it cost to drill a well in ZIP 99403?

Applying published per-foot rates to the local median depth of 365 ft: drilling and casing alone typically runs $9,125–$23,725; a complete system including pump, pressure tank, and hookup typically runs $21,900–$36,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in ZIP 99403?

The median static water level is 225 ft below ground surface (middle half of wells: 140 ft–278 ft), from 50 measurements.

Drilled depth distribution

0–50 ft 0 50–100 ft 2 100–150 ft 14 150–200 ft 7 200–300 ft 21 300–400 ft 42 400–600 ft 31 600+ ft 29
Looking at a specific property in ZIP 99403?

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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.