⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › Plymouth (99346)

Plymouth, WA (99346): well depth, water level & drilling cost

✓ 87 Ecology records · Benton County

220 ftmedian well depth
99 ft–383 fttypical depth range
100 ftmedian static water level
50 gpmmedian yield (23 tests)

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How deep are wells in and around Plymouth (99346), Washington?

The median drilled well depth in and around Plymouth (99346) is 220 ft, based on 87 wells with recorded depths in the state Ecology database. Half fall between 99 ft and 383 ft; 90% are shallower than 623 ft.

How much does it cost to drill a well in and around Plymouth (99346)?

Applying published per-foot rates to the local median depth of 220 ft: drilling and casing alone typically runs $5,500–$14,300; a complete system including pump, pressure tank, and hookup typically runs $13,200–$22,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Plymouth (99346)?

The median static water level is 100 ft below ground surface (middle half of wells: 40 ft–230 ft), from 22 measurements.

Drilled depth distribution

0–50 ft 6 50–100 ft 16 100–150 ft 9 150–200 ft 8 200–300 ft 12 300–400 ft 16 400–600 ft 10 600+ ft 10
Looking at a specific property in Plymouth (99346)?

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Get quotes from drillers who work in Plymouth (99346)

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Part of Benton 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.