⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Spokane County › ZIP 99031

ZIP 99031, Spokane County: well depth, water level & drilling cost

✓ 203 Ecology records · Spokane County

280 ftmedian well depth
160 ft–343 fttypical depth range
180 ftmedian static water level
20 gpmmedian yield (80 tests)

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How deep are wells in ZIP 99031, Washington?

The median drilled well depth in ZIP 99031 is 280 ft, based on 203 wells with recorded depths in the state Ecology database. Half fall between 160 ft and 343 ft; 90% are shallower than 420 ft.

How much does it cost to drill a well in ZIP 99031?

Applying published per-foot rates to the local median depth of 280 ft: drilling and casing alone typically runs $7,000–$18,200; a complete system including pump, pressure tank, and hookup typically runs $16,800–$28,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in ZIP 99031?

The median static water level is 180 ft below ground surface (middle half of wells: 53 ft–253 ft), from 71 measurements.

Drilled depth distribution

0–50 ft 0 50–100 ft 10 100–150 ft 35 150–200 ft 22 200–300 ft 38 300–400 ft 67 400–600 ft 30 600+ ft 1
Looking at a specific property in ZIP 99031?

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Part of Spokane 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.