⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Thurston County › Olympia (98505)

Olympia, WA (98505): well depth, water level & drilling cost

✓ 870 Ecology records · Thurston County

109 ftmedian well depth
78 ft–153 fttypical depth range
50 ftmedian static water level
15 gpmmedian yield (41 tests)

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How deep are wells in and around Olympia (98505), Washington?

The median drilled well depth in and around Olympia (98505) is 109 ft, based on 867 wells with recorded depths in the state Ecology database. Half fall between 78 ft and 153 ft; 90% are shallower than 225 ft.

How much does it cost to drill a well in and around Olympia (98505)?

Applying published per-foot rates to the local median depth of 109 ft: drilling and casing alone typically runs $2,725–$7,085; a complete system including pump, pressure tank, and hookup typically runs $6,540–$10,900. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Olympia (98505)?

The median static water level is 50 ft below ground surface (middle half of wells: 21 ft–89 ft), from 186 measurements.

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Drilled depth distribution

0–50 ft 64 50–100 ft 307 100–150 ft 276 150–200 ft 99 200–300 ft 59 300–400 ft 35 400–600 ft 22 600+ ft 5
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Part of Thurston 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.