Washington Well Data › Mason County
Mason County, Washington: well depth, water level & drilling cost
✓ 10,060 Ecology records · verified 2026-06-11
How deep are wells in Mason County, Washington?
The median drilled well depth in Mason County is 116 ft, based on 9,726 wells with recorded depths in the state Ecology database. Half of all wells fall between 74 ft and 180 ft; 90% are shallower than 258 ft. Wells drilled since 2016 have a median depth of 139 ft.
How much does it cost to drill a well in Mason County?
Applying published per-foot rates to the local median depth of 139 ft: drilling and casing alone typically runs $3,475–$9,035; a complete system including pump, pressure tank, and hookup typically runs $8,340–$13,900. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Mason County?
The median static water level is 53 ft below ground surface (middle half of wells: 24 ft–110 ft), from 2,605 measurements.
How much water do wells in Mason County produce?
The median tested yield is 20 gpm (middle half: 14 gpm–30 gpm), from 2,841 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Mason 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 |
|---|---|
| Joshua Koepp | 361 |
| Rogeray Phythian | 239 |
| Emily Davis | 136 |
| Dwane Knapp | 96 |
| Christopher Jones | 63 |
| Robert Laymon | 55 |
| Cory Johnson | 54 |
| Clayton Pitts | 50 |
Get quotes from local drillers
See every recorded well near any address — depths, water levels, yields, original driller's logs — in a one-time report.
Free lookup Property report — $19Method: 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.