Washington Well Data field records · 2026 survey

Washington Well DataKing County › ZIP 98070

ZIP 98070, King County: well depth, water level & drilling cost

✓ 174 Ecology records · King County

181 ftmedian well depth
123 ft–257 fttypical depth range
111 ftmedian static water level
15 gpmmedian yield (70 tests)

How deep are wells in ZIP 98070, Washington?

The median drilled well depth in ZIP 98070 is 181 ft, based on 173 wells with recorded depths in the state Ecology database. Half fall between 123 ft and 257 ft; 90% are shallower than 339 ft.

How much does it cost to drill a well in ZIP 98070?

Applying published per-foot rates to the local median depth of 186 ft: drilling and casing alone typically runs $4,650–$12,090; a complete system including pump, pressure tank, and hookup typically runs $11,160–$18,600. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers who work in ZIP 98070

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 ZIP 98070?

The median static water level is 111 ft below ground surface (middle half of wells: 74 ft–160 ft), from 64 measurements.

Pull every recorded well near a ZIP 98070 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 4 50–100 ft 19 100–150 ft 39 150–200 ft 39 200–300 ft 40 300–400 ft 21 400–600 ft 10 600+ ft 1
Looking at a specific property in ZIP 98070?

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.