⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Columbia County › Dayton (99328)

Dayton, WA (99328): well depth, water level & drilling cost

✓ 269 Ecology records · Columbia County

280 ftmedian well depth
150 ft–475 fttypical depth range
137 ftmedian static water level
20 gpmmedian yield (62 tests)

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How deep are wells in and around Dayton (99328), Washington?

The median drilled well depth in and around Dayton (99328) is 280 ft, based on 265 wells with recorded depths in the state Ecology database. Half fall between 150 ft and 475 ft; 90% are shallower than 674 ft.

How much does it cost to drill a well in and around Dayton (99328)?

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 and around Dayton (99328)?

The median static water level is 137 ft below ground surface (middle half of wells: 42 ft–335 ft), from 44 measurements.

Drilled depth distribution

0–50 ft 5 50–100 ft 16 100–150 ft 43 150–200 ft 30 200–300 ft 47 300–400 ft 30 400–600 ft 52 600+ ft 42
Looking at a specific property in Dayton (99328)?

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Get quotes from drillers who work in Dayton (99328)

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Part of Columbia 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.