⟁ Washington Well Data field records · 2026 survey

Washington Well Data › King County › Maple Valley (98038)

Maple Valley, WA (98038): well depth, water level & drilling cost

✓ 115 Ecology records · King County

124 ftmedian well depth
81 ft–180 fttypical depth range
65 ftmedian static water level
30 gpmmedian yield (63 tests)

How deep are wells in Maple Valley (98038), Washington?

The median drilled well depth in Maple Valley (98038) is 124 ft, based on 114 wells with recorded depths in the state Ecology database. Half fall between 81 ft and 180 ft; 90% are shallower than 260 ft.

How much does it cost to drill a well in Maple Valley (98038)?

Applying published per-foot rates to the local median depth of 132 ft: drilling and casing alone typically runs $3,300–$8,580; a complete system including pump, pressure tank, and hookup typically runs $7,920–$13,200. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers who work in Maple Valley (98038)

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

What is the static water level in Maple Valley (98038)?

The median static water level is 65 ft below ground surface (middle half of wells: 34 ft–126 ft), from 55 measurements.

Pull every recorded well near a Maple Valley (98038) address — $19

Bad well water in King County?

Iron staining, rotten-egg smell, hard water, or a failed test at closing — Salish Water Works, a new Puget Sound company, publishes its treatment systems and planned prices up front and specs the fix from your water test. No in-home sales visit. Installation opens Fall 2026; the waitlist is open now and waitlist members get first slot priority.

See planned systems & pricing → salishwaterworks.com

Drilled depth distribution

0–50 ft 8 50–100 ft 31 100–150 ft 28 150–200 ft 25 200–300 ft 14 300–400 ft 5 400–600 ft 3 600+ ft 0
Looking at a specific property in Maple Valley (98038)?

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 King 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.