Washington Well Data › Walla Walla County
Walla Walla County, Washington: well depth, water level & drilling cost
✓ 3,556 Ecology records · verified 2026-10-02
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How deep are wells in Walla Walla County, Washington?
The median drilled well depth in Walla Walla County is 155 ft, based on 3,548 wells with recorded depths in the state Ecology database. Half of all wells fall between 100 ft and 224 ft; 90% are shallower than 475 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 54 ft below ground surface (middle half of wells: 25 ft–125 ft), from 521 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 576 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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).
| Driller | Wells since 2016 |
|---|---|
| Blake Harding | 158 |
| James Hickam | 78 |
| Aidan Gemmell | 51 |
| Brandon Brown | 39 |
| Brady Voth | 35 |
| John Kline | 19 |
| Chad Courtney | 19 |
| Gerald Harding | 18 |
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Well records by ZIP code in Walla Walla County
Median depth, water level, and yield for each ZIP code with recorded wells.
- 99362 — 1,870 wells, median 160 ft
- College Place (99324) — 516 wells, median 150 ft
- Burbank (99323) — 492 wells, median 100 ft
- 99360 — 374 wells, median 140 ft
- Dixie (99329) — 136 wells, median 285 ft
- Waitsburg (99361) — 128 wells, median 266 ft
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.