WashingtonWell Data
Every dot on this map is a real well. We pulled all 1,186,928 Washington well-construction records - depth, water level, yield, and county - and drew the state with them. Brighter means more wells; color is how deep they go.
28 ft
Median well depth
27 ft
Median water level
19 gpm
Median yield
17/39
Counties covered
Check the water table at your Washington address
See typical well depth and static water level near any Washington address, drawn from these same records - free.
What 1,186,928 Washington wells tell us
1,186,928
Washington well records on file
28 ft
Median well depth (half between 18 and 79 ft)
27 ft
Median static water level (water table)
19 gpm
Median tested well yield
95%
Have a recorded depth (1,123,718 wells)
8,726
Distinct drilling companies on record
The median Washington well is 28 ft deep; the average is a bit higher (about 143 ft), pulled up by a long tail of very deep wells in the Driftless Area and the Door Peninsula. Numbers here come straight from filed well-construction reports - not a model.
How deep Washington wells go
Each bar is the share of wells finished at that depth (20-ft bins). Most Washington wells land between 40 and 200 ft.
Well depth & water by Washington county
17 of Washington's 39 counties - those whose well records carry confidently geolocated coordinates, ranked by number of wells on record. Median depth, median static water level, and median tested yield for each - real figures, computed from every filed report we hold.
| County | Wells | Median depth | Water level | Yield |
|---|---|---|---|---|
| King | 363,840 | 23 ft | 18 ft | 21 gpm |
| Pierce | 131,686 | 24 ft | 15 ft | 21 gpm |
| Snohomish | 106,069 | 25 ft | 10 ft | 16 gpm |
| Clark | 57,235 | 40 ft | 37 ft | 15 gpm |
| Whatcom | 46,461 | 25 ft | 12 ft | 18 gpm |
| Spokane | 44,365 | 114 ft | 59 ft | 16 gpm |
| Kitsap | 41,117 | 36 ft | 44 ft | 16 gpm |
| Yakima | 33,751 | 62 ft | 61 ft | 53 gpm |
| Skagit | 26,697 | 27 ft | 19 ft | 17 gpm |
| Cowlitz | 26,149 | 36 ft | 34 ft | 16 gpm |
| Lewis | 23,313 | 57 ft | 34 ft | 20 gpm |
| Kittitas | 15,864 | 43 ft | 12 ft | 21 gpm |
| Mason | 15,116 | 80 ft | 49 ft | 20 gpm |
| Klickitat | 9,551 | 148 ft | 118 ft | 24 gpm |
| San Juan | 6,735 | 224 ft | 32 ft | 8 gpm |
| Pend Oreille | 5,534 | 119 ft | 44 ft | 13 gpm |
| Pacific | 5,015 | 24 ft | 12 ft | 13 gpm |
Explore every well
The static map above is the whole state at a glance. Open the interactive DrillerDB well map to zoom to any Washington address, click individual wells, and read their depth, water level, and construction details.
Open the well map
A century of Washington wells
Washington has required a well construction report for every new well since 1936, and DrillerDB's records reach back to the 1930s. Wells drilled per decade:
Washington well questions
How deep are wells in Washington?
The median water well in Washington is 28 ft deep, based on 1,123,718 records with a reported depth. Half of all wells fall between 18 and 79 ft. Depth varies a lot by county - from about 23 ft in the shallowest counties to over 224 ft in the deepest.
What is the water table depth in Washington?
The median static water level (the depth to standing groundwater) across Washington records is about 27 ft. It is usually much shallower than the finished well depth, because wells are drilled past the water table to reach a dependable aquifer.
How many well records does Washington have?
DrillerDB holds 1,186,928 Washington well records - part of an 18-million-record national database built from state well-construction reports. Washington has required a well construction report for every new well since 1936.
How do I look up a specific address or well in Washington?
Use the free water table depth lookup to see typical depth and water level at any address, or open the interactive well map to browse individual well records near a location.
Source: 1,186,928 Washington well-construction records in the DrillerDB database, current through June 2026. Medians are computed from reported values; individual wells vary. Always confirm site conditions with a licensed local driller.
Well data for other states
The same real-record breakdown - median well depth, static water level, yield, and county tables - for the other states in the DrillerDB database.
Researcher? Academic and institutional researchers can get free record-level access to these wells for non-commercial work through the DrillerDB Research Program.
About the Research ProgramPlanning a well?
Start with the free address lookup, then find a licensed Washington driller.
Drill wells for a living?
This is the same well data that powers quoting, scheduling, and state reporting for drilling companies across the country.
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