Washington Well Data › Grays Harbor County
Grays Harbor County, Washington: well depth, water level & drilling cost
✓ 4,152 Ecology records · verified 2026-10-02
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How deep are wells in Grays Harbor County, Washington?
The median drilled well depth in Grays Harbor County is 83 ft, based on 4,136 wells with recorded depths in the state Ecology database. Half of all wells fall between 57 ft and 140 ft; 90% are shallower than 215 ft. Wells drilled since 2016 have a median depth of 92 ft.
How much does it cost to drill a well in Grays Harbor County?
Applying published per-foot rates to the local median depth of 92 ft: drilling and casing alone typically runs $2,300–$5,980; a complete system including pump, pressure tank, and hookup typically runs $5,520–$9,200. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Grays Harbor County?
The median static water level is 24 ft below ground surface (middle half of wells: 12 ft–47 ft), from 1,291 measurements.
How much water do wells in Grays Harbor County produce?
The median tested yield is 20 gpm (middle half: 11 gpm–30 gpm), from 717 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Grays Harbor 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 | 143 |
| Christopher Jones | 71 |
| Rogeray Phythian | 69 |
| Robert Laymon | 57 |
| Daniel King | 52 |
| Albert Smith | 52 |
| Daniel Carpenter | 26 |
| Cory Johnson | 26 |
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Well records by ZIP code in Grays Harbor County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Elma (98541) — 746 wells, median 91 ft
- Oakville (98568) — 591 wells, median 64 ft
- Mccleary (98557) — 554 wells, median 60 ft
- Montesano (98563) — 462 wells, median 85 ft
- Satsop (98583) — 382 wells, median 73 ft
- Aberdeen (98520) — 297 wells, median 101 ft
- Malone (98559) — 241 wells, median 96 ft
- Hoquiam (98550) — 234 wells, median 99 ft
- Copalis Beach (98535) — 182 wells, median 102 ft
- Copalis Crossing (98536) — 147 wells, median 76 ft
- Cosmopolis (98537) — 141 wells, median 64 ft
- Westport (98595) — 140 wells, median 133 ft
- Ocean Shores (98569) — 83 wells, median 74 ft
- Humptulips (98552) — 64 wells, median 79 ft
- Amanda Park (98526) — 61 wells, median 62 ft
- Quinault (98575) — 56 wells, median 45 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.