The state of Washington keeps a log of every well ever drilled. We read all 164,452 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 · 2026-08-03
157 ftmedian well depth statewide
63 ftmedian static water level
20 gpmmedian well yield
38,263wells 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 — $19Driller, agent, or inspector? Unlimited & white-label plans →
Looking for the filed driller's report itself? See Washington well logs — what's in one, how far back the records go, and the three ways to find one.
Well data by county
Adams County
806 wells · median 300 ft Asotin County
537 wells · median 210 ft Benton County
4,434 wells · median 162 ft Chelan County
4,389 wells · median 155 ft Clallam County
4,279 wells · median 120 ft Clark County
7,019 wells · median 183 ft Columbia County
325 wells · median 261 ft Cowlitz County
5,834 wells · median 201 ft Douglas County
1,317 wells · median 180 ft Ferry County
1,681 wells · median 200 ft Franklin County
1,714 wells · median 204 ft Garfield County
146 wells · median 240 ft Grant County
5,487 wells · median 180 ft Grays Harbor County
2,226 wells · median 91 ft Island County
3,490 wells · median 178 ft Jefferson County
1,906 wells · median 160 ft King County
4,738 wells · median 142 ft Kitsap County
5,309 wells · median 146 ft Kittitas County
5,027 wells · median 210 ft Klickitat County
3,738 wells · median 282 ft Lewis County
8,357 wells · median 100 ft Lincoln County
1,907 wells · median 230 ft Mason County
5,584 wells · median 129 ft Okanogan County
7,153 wells · median 167 ft Pacific County
1,385 wells · median 24 ft Pend Oreille County
2,968 wells · median 160 ft Pierce County
8,261 wells · median 128 ft San Juan County
3,091 wells · median 300 ft Skagit County
3,789 wells · median 80 ft Skamania County
1,305 wells · median 210 ft Snohomish County
8,922 wells · median 105 ft Spokane County
14,399 wells · median 222 ft Stevens County
7,317 wells · median 220 ft Thurston County
9,050 wells · median 100 ft Wahkiakum County
367 wells · median 120 ft Walla Walla County
1,942 wells · median 162 ft Whatcom County
4,995 wells · median 72 ft Whitman County
810 wells · median 220 ft Yakima County
8,440 wells · median 185 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.