⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Benton County › Prosser (99350)

Prosser, WA (99350): well depth, water level & drilling cost

✓ 1,277 Ecology records · Benton County

125 ftmedian well depth
108 ft–180 fttypical depth range
36 ftmedian static water level
30 gpmmedian yield (243 tests)

Pull every recorded well near a Prosser (99350) address — $49

How deep are wells in and around Prosser (99350), Washington?

The median drilled well depth in and around Prosser (99350) is 125 ft, based on 1,274 wells with recorded depths in the state Ecology database. Half fall between 108 ft and 180 ft; 90% are shallower than 360 ft.

How much does it cost to drill a well in and around Prosser (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.

What is the static water level in and around Prosser (99350)?

The median static water level is 36 ft below ground surface (middle half of wells: 21 ft–91 ft), from 313 measurements.

Drilled depth distribution

0–50 ft 9 50–100 ft 196 100–150 ft 631 150–200 ft 160 200–300 ft 118 300–400 ft 60 400–600 ft 55 600+ ft 45
Looking at a specific property in Prosser (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 — $49
Get quotes from drillers who work in Prosser (99350)

Free. Goes to licensed drillers working Benton County.

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.