⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Walla Walla County

Walla Walla County, Washington: well depth, water level & drilling cost

✓ 4,476 Ecology records · verified 2026-06-11

157 ftmedian well depth
100 ft–238 fttypical depth range
53 ftmedian static water level
30 gpmmedian yield (589 tests)

How deep are wells in Walla Walla County, Washington?

The median drilled well depth in Walla Walla County is 157 ft, based on 4,299 wells with recorded depths in the state Ecology database. Half of all wells fall between 100 ft and 238 ft; 90% are shallower than 551 ft. Wells drilled since 2016 have a median depth of 165 ft.

How much does it cost to drill a well in Walla Walla County?

Applying published per-foot rates to the local median depth of 165 ft: drilling and casing alone typically runs $4,125–$10,725; a complete system including pump, pressure tank, and hookup typically runs $9,900–$16,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Walla Walla County?

The median static water level is 53 ft below ground surface (middle half of wells: 24 ft–122 ft), from 526 measurements.

How much water do wells in Walla Walla County produce?

The median tested yield is 30 gpm (middle half: 20 gpm–50 gpm), from 589 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 283 50–100 ft 791 100–150 ft 935 150–200 ft 796 200–300 ft 698 300–400 ft 191 400–600 ft 232 600+ ft 373

Who drills wells in Walla Walla County?

Licensed drillers by number of wells completed in this county since 2016, per filed well reports (license roster: Washington Department of Ecology).

DrillerWells since 2016
Blake Harding158
James Hickam78
Aidan Gemmell50
Brandon Brown38
Brady Voth35
Chad Courtney19
Gerald Harding18
John Kline18

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Method: medians computed from Ecology records (water wells only — soil/environmental borings and decommissions excluded; depths 0–5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.