⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Snohomish County

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

✓ 18,532 Ecology records · verified 2026-06-11

100 ftmedian well depth
58 ft–175 fttypical depth range
48 ftmedian static water level
15 gpmmedian yield (1,736 tests)

How deep are wells in Snohomish County, Washington?

The median drilled well depth in Snohomish County is 100 ft, based on 16,750 wells with recorded depths in the state Ecology database. Half of all wells fall between 58 ft and 175 ft; 90% are shallower than 270 ft. Wells drilled since 2016 have a median depth of 118 ft.

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

Applying published per-foot rates to the local median depth of 118 ft: drilling and casing alone typically runs $2,950–$7,670; a complete system including pump, pressure tank, and hookup typically runs $7,080–$11,800. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Snohomish County?

The median static water level is 48 ft below ground surface (middle half of wells: 17 ft–110 ft), from 1,686 measurements.

How much water do wells in Snohomish County produce?

The median tested yield is 15 gpm (middle half: 7 gpm–25 gpm), from 1,736 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 3,448 50–100 ft 4,668 100–150 ft 3,245 150–200 ft 2,048 200–300 ft 2,024 300–400 ft 794 400–600 ft 474 600+ ft 49

Who drills wells in Snohomish 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
Paul Anderson437
Gary Maze181
Ralph Riggles151
Dale Westby149
Pierce Kiltoff104
David Rutledge101
Brannon Hopke75
Westin Halvorson74

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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.