The state of Washington keeps a log of every well ever drilled. We read all 342,388 of them.
How deep is the water under Washington?
County by county, well by well.
Median drilled depths, static water levels, tested yields, and what a new well actually costs — computed from the official record, not national averages.
✓ Verified against Ecology · 2026-06-11
138 ftmedian well depth statewide
55 ftmedian static water level
20 gpmmedian well yield
38,557wells drilled since 2016
Buying property with a well — or land you'd need to drill?
See every recorded well near any Washington address: depths, water levels, yields, and the original driller's logs.
Free address lookup Property report — $19Well data by county
Adams County
1,882 wells · median 360 ft Asotin County
818 wells · median 200 ft Benton County
8,352 wells · median 144 ft Chelan County
7,524 wells · median 119 ft Clallam County
9,516 wells · median 102 ft Clark County
20,265 wells · median 150 ft Columbia County
459 wells · median 245 ft Cowlitz County
9,867 wells · median 200 ft Douglas County
2,297 wells · median 146 ft Ferry County
2,825 wells · median 172 ft Franklin County
3,089 wells · median 178 ft Garfield County
291 wells · median 190 ft Grant County
9,634 wells · median 175 ft Grays Harbor County
4,821 wells · median 80 ft Island County
6,772 wells · median 174 ft Jefferson County
4,777 wells · median 134 ft King County
22,932 wells · median 120 ft Kitsap County
14,411 wells · median 130 ft Kittitas County
6,776 wells · median 193 ft Klickitat County
6,197 wells · median 260 ft Lewis County
13,511 wells · median 100 ft Lincoln County
2,944 wells · median 235 ft Mason County
10,060 wells · median 116 ft Okanogan County
12,314 wells · median 134 ft Pacific County
2,211 wells · median 25 ft Pend Oreille County
4,567 wells · median 146 ft Pierce County
22,898 wells · median 116 ft San Juan County
5,782 wells · median 264 ft Skagit County
7,950 wells · median 78 ft Skamania County
1,747 wells · median 203 ft Snohomish County
18,532 wells · median 100 ft Spokane County
27,758 wells · median 200 ft Stevens County
12,449 wells · median 188 ft Thurston County
19,230 wells · median 90 ft Wahkiakum County
506 wells · median 118 ft Walla Walla County
4,476 wells · median 157 ft Whatcom County
11,300 wells · median 58 ft Whitman County
1,694 wells · median 196 ft Yakima County
18,185 wells · median 163 ft
What you can answer here
- How deep will my well need to be? Median and range of actual drilled depths near you — not national averages.
- What will it cost? Local median depth × published per-foot rates, with the math shown.
- Will it produce enough water? Yields from pump tests on nearby wells.
- Who drills around here? The drillers who actually filed recent well logs in your county.