⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Grant County

Grant County, Washington: well depth, water level & drilling cost

✓ 9,634 Ecology records · verified 2026-06-11

175 ftmedian well depth
115 ft–280 fttypical depth range
80 ftmedian static water level
40 gpmmedian yield (1,797 tests)

How deep are wells in Grant County, Washington?

The median drilled well depth in Grant County is 175 ft, based on 9,294 wells with recorded depths in the state Ecology database. Half of all wells fall between 115 ft and 280 ft; 90% are shallower than 480 ft. Wells drilled since 2016 have a median depth of 200 ft.

How much does it cost to drill a well in Grant 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 Grant County?

The median static water level is 80 ft below ground surface (middle half of wells: 43 ft–150 ft), from 1,656 measurements.

How much water do wells in Grant County produce?

The median tested yield is 40 gpm (middle half: 25 gpm–60 gpm), from 1,797 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 315 50–100 ft 1,353 100–150 ft 2,083 150–200 ft 1,600 200–300 ft 1,815 300–400 ft 843 400–600 ft 684 600+ ft 601

Who drills wells in Grant County?

Licensed drillers by number of wells completed in this county since 2016, per filed well reports (license roster: Washington Department of Ecology).

DrillerWells since 2016
Daniel Eilers345
Jose Rojas206
Kevin Boyd203
Salvador Valenciano124
Alex Kerslake99
Justin Pinkerton76
Pedro Gama Valladares70
Daniel Waterman55

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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.