Washington Well Data › Jefferson County
Jefferson County, Washington: well depth, water level & drilling cost
✓ 1,906 Ecology records · verified 2026-07-28
How deep are wells in Jefferson County, Washington?
The median drilled well depth in Jefferson County is 160 ft, based on 1,856 wells with recorded depths in the state Ecology database. Half of all wells fall between 89 ft and 256 ft; 90% are shallower than 353 ft. Wells drilled since 2016 have a median depth of 170 ft.
How much does it cost to drill a well in Jefferson County?
Applying published per-foot rates to the local median depth of 170 ft: drilling and casing alone typically runs $4,250–$11,050; a complete system including pump, pressure tank, and hookup typically runs $10,200–$17,000. Actual quotes depend on site access, geology, and casing requirements.
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What is the static water level in Jefferson County?
The median static water level is 86 ft below ground surface (middle half of wells: 35 ft–162 ft), from 294 measurements.
How much water do wells in Jefferson County produce?
The median tested yield is 12 gpm (middle half: 5 gpm–20 gpm), from 344 pump tests. A typical household needs 5–10 gpm.
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Drilled depth distribution
Who drills wells in Jefferson 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 |
|---|---|
| Raymond Bauer | 38 |
| Richard Debler | 30 |
| James Tillia | 29 |
| Jack Wilson | 26 |
| Joshua Koepp | 21 |
| Donald Lofall | 19 |
| Rogeray Phythian | 18 |
| Eugene Williams | 12 |
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Median depth, water level, and yield for each ZIP code with recorded wells.
- 98376 — 219 wells, median 179 ft
- 98368 — 131 wells, median 210 ft
- 98365 — 86 wells, median 155 ft
- 98320 — 84 wells, median 220 ft
- 98325 — 70 wells, median 96 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.