⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › ZIP 99350

ZIP 99350, Benton County: well depth, water level & drilling cost

✓ 447 Ecology records · Benton County

135 ftmedian well depth
120 ft–190 fttypical depth range
54 ftmedian static water level
30 gpmmedian yield (135 tests)

How deep are wells in ZIP 99350, Washington?

The median drilled well depth in ZIP 99350 is 135 ft, based on 446 wells with recorded depths in the state Ecology database. Half fall between 120 ft and 190 ft; 90% are shallower than 385 ft.

How much does it cost to drill a well in ZIP 99350?

Applying published per-foot rates to the local median depth of 160 ft: drilling and casing alone typically runs $4,000–$10,400; a complete system including pump, pressure tank, and hookup typically runs $9,600–$16,000. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers who work in ZIP 99350

Free for property owners. We route your request only to licensed drillers who actually file well logs in Benton County — never sold elsewhere.

What is the static water level in ZIP 99350?

The median static water level is 54 ft below ground surface (middle half of wells: 24 ft–135 ft), from 121 measurements.

Pull every recorded well near a ZIP 99350 address — $19

Drilled depth distribution

0–50 ft 0 50–100 ft 42 100–150 ft 232 150–200 ft 65 200–300 ft 33 300–400 ft 31 400–600 ft 22 600+ ft 21
Looking at a specific property in ZIP 99350?

See every recorded well near any address — depths, water levels, yields, original driller's logs — in a one-time report.

Free lookup Property report — $19

Part of Benton 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.