⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Cowlitz County › Castle Rock (98611)

Castle Rock, WA (98611): well depth, water level & drilling cost

✓ 1,997 Ecology records · Cowlitz County

181 ftmedian well depth
104 ft–281 fttypical depth range
64 ftmedian static water level
12 gpmmedian yield (507 tests)

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How deep are wells in and around Castle Rock (98611), Washington?

The median drilled well depth in and around Castle Rock (98611) is 181 ft, based on 1,987 wells with recorded depths in the state Ecology database. Half fall between 104 ft and 281 ft; 90% are shallower than 402 ft.

How much does it cost to drill a well in and around Castle Rock (98611)?

Applying published per-foot rates to the local median depth of 184 ft: drilling and casing alone typically runs $4,600–$11,960; a complete system including pump, pressure tank, and hookup typically runs $11,040–$18,400. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Castle Rock (98611)?

The median static water level is 64 ft below ground surface (middle half of wells: 31 ft–115 ft), from 602 measurements.

Drilled depth distribution

0–50 ft 116 50–100 ft 316 100–150 ft 372 150–200 ft 277 200–300 ft 448 300–400 ft 237 400–600 ft 174 600+ ft 47
Looking at a specific property in Castle Rock (98611)?

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Part of Cowlitz 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.