Washington Well Data › Columbia County
Columbia County, Washington: well depth, water level & drilling cost
✓ 412 Ecology records · verified 2026-10-02
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How deep are wells in Columbia County, Washington?
The median drilled well depth in Columbia County is 250 ft, based on 409 wells with recorded depths in the state Ecology database. Half of all wells fall between 140 ft and 416 ft; 90% are shallower than 604 ft. Wells drilled since 2016 have a median depth of 260 ft.
How much does it cost to drill a well in Columbia County?
Applying published per-foot rates to the local median depth of 250 ft: drilling and casing alone typically runs $6,250–$16,250; a complete system including pump, pressure tank, and hookup typically runs $15,000–$25,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Columbia County?
The median static water level is 133 ft below ground surface (middle half of wells: 47 ft–277 ft), from 55 measurements.
How much water do wells in Columbia County produce?
The median tested yield is 20 gpm (middle half: 15 gpm–30 gpm), from 81 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Columbia 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 |
|---|---|
| James Hickam | 34 |
| Aidan Gemmell | 15 |
| Brady Voth | 3 |
| Caleb Forsmann | 3 |
| David Smith | 3 |
| Garry Zollman | 2 |
| Lyle Amos | 1 |
| Doug Schnabl | 1 |
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Well records by ZIP code in Columbia County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Dayton (99328) — 269 wells, median 280 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.