⟁ Washington Well Data field records · 2026 survey

Washington Well Data › King County › Vashon (98070)

Vashon, WA (98070): well depth, water level & drilling cost

✓ 468 Ecology records · King County

162 ftmedian well depth
117 ft–259 fttypical depth range
115 ftmedian static water level
15 gpmmedian yield (82 tests)

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How deep are wells in and around Vashon (98070), Washington?

The median drilled well depth in and around Vashon (98070) is 162 ft, based on 464 wells with recorded depths in the state Ecology database. Half fall between 117 ft and 259 ft; 90% are shallower than 342 ft.

How much does it cost to drill a well in and around Vashon (98070)?

Applying published per-foot rates to the local median depth of 162 ft: drilling and casing alone typically runs $4,050–$10,530; a complete system including pump, pressure tank, and hookup typically runs $9,720–$16,200. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Vashon (98070)?

The median static water level is 115 ft below ground surface (middle half of wells: 76 ft–163 ft), from 77 measurements.

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Drilled depth distribution

0–50 ft 10 50–100 ft 61 100–150 ft 124 150–200 ft 89 200–300 ft 95 300–400 ft 56 400–600 ft 24 600+ ft 5
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Part of King 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.