⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Grant County › Mattawa (99349)

Mattawa, WA (99349): well depth, water level & drilling cost

✓ 328 Ecology records · Grant County

140 ftmedian well depth
80 ft–370 fttypical depth range
80 ftmedian static water level
45 gpmmedian yield (67 tests)

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How deep are wells in and around Mattawa (99349), Washington?

The median drilled well depth in and around Mattawa (99349) is 140 ft, based on 328 wells with recorded depths in the state Ecology database. Half fall between 80 ft and 370 ft; 90% are shallower than 595 ft.

How much does it cost to drill a well in and around Mattawa (99349)?

Applying published per-foot rates to the local median depth of 140 ft: drilling and casing alone typically runs $3,500–$9,100; a complete system including pump, pressure tank, and hookup typically runs $8,400–$14,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Mattawa (99349)?

The median static water level is 80 ft below ground surface (middle half of wells: 41 ft–256 ft), from 61 measurements.

Drilled depth distribution

0–50 ft 12 50–100 ft 101 100–150 ft 55 150–200 ft 24 200–300 ft 33 300–400 ft 28 400–600 ft 42 600+ ft 33
Looking at a specific property in Mattawa (99349)?

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Part of Grant County well records.

Method: medians computed from Ecology records (water wells only — soil/environmental borings and decommissions excluded; depths 0–5,000 ft), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.