Washington Well Data › Asotin County
Asotin County, Washington: well depth, water level & drilling cost
✓ 768 Ecology records · verified 2026-10-02
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How deep are wells in Asotin County, Washington?
The median drilled well depth in Asotin County is 200 ft, based on 768 wells with recorded depths in the state Ecology database. Half of all wells fall between 133 ft and 340 ft; 90% are shallower than 530 ft. Wells drilled since 2016 have a median depth of 290 ft.
How much does it cost to drill a well in Asotin County?
Applying published per-foot rates to the local median depth of 200 ft: drilling and casing alone typically runs $5,000–$13,000; a complete system including pump, pressure tank, and hookup typically runs $12,000–$20,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Asotin County?
The median static water level is 124 ft below ground surface (middle half of wells: 64 ft–259 ft), from 116 measurements.
How much water do wells in Asotin County produce?
The median tested yield is 20 gpm (middle half: 10 gpm–30 gpm), from 129 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Asotin 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 |
|---|---|
| Brett Uhlenkott | 68 |
| Eric Forsmann | 38 |
| Caleb Forsmann | 15 |
| Mark Nail | 13 |
| John Kline | 1 |
| James Hickam | 1 |
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Well records by ZIP code in Asotin County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Clarkston (99403) — 340 wells, median 280 ft
- 99401 — 236 wells, median 165 ft
- 99402 — 197 wells, median 175 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.