Water wells in King County, Texas
108 well reports on file. The median well here was taken to 82 ft and struck water at 65 ft — against 180 ft and 80 ft across Texas.
What you will drill through in King County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Gypsum 18, Gray Shale 19, Sandy Clay 15, Red Clay 8, Sand 8, Top Soil 8 |
| 25–50 ft | Gypsum 10, Gray Shale 11, Rock 5, Sandy Clay 5, Gyp Rock 4, Light Brown Sandy Clay 4 |
| 50–100 ft | Rock 6, Clay 5, Red Clay 4, Sandy Clay 4, Gyp Rock 4, Sand And Water 4 |
| 100–200 ft | Rock 3, Clay 4, Red Clay 3, Sand And Water 3, Shale 1, Gyp Rock 2 |
| 200–300 ft | Lime Rock (Water) 2, Lime Rock (Cavity) Red Clay 1, Rock 1, Shale 1, Clay And Rock 1, Gray Lime (Water) 1 |
The rock column here is what drillers wrote down, layer by layer, in their own words — 5,345,462 layers across 707,856 wells. It is not a geological survey: two drillers may call the same clay by two names, and this site does not correct them.
Who drills in King County
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| E&C DRILLING CO. | 26 | 107 | 6 | 2003–2024 |
| Straub Corporation | 23 | 38 | — | 2005 |
| Talon Drilling, LP | 15 | 75 | — | 2002–2008 |
| LEONARD DRILLING LLC | 9 | 80 | 13 | 2004–2024 |
| Brent Whitaker | 8 | 220 | 15 | 2013–2023 |
| Gillispie Drilling | 5 | 91 | 12 | 2024–2026 |
| LEONARD WATER SERVICES | 4 | 120 | 10 | 2015–2026 |
| Peterson Drilling & Testing, Inc. | 4 | — | — | 2011 |
| Kitchens Corrosion Control Inc. | 3 | 40 | — | 2004 |
| Mahorney Drilling | 2 | 223 | 500 | 2004–2016 |
| Mullen & Sons | 2 | — | 5 | 2009 |
| Groundwater Monitoring Inc. | 2 | — | — | 2008 |
| Carter Drilling Co., Inc | 1 | 317 | — | 2024 |
| WP Drilling | 1 | 240 | 10 | 2022 |
| Mullen & Son's | 1 | — | 6 | 2012 |
| Talon/LPE | 1 | 85 | — | 2010 |
| O'Neal Well Service | 1 | 80 | 6 | 2009 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Stock | 43 | 39.8% | 100 |
| Environmental Soil Boring | 30 | 27.8% | 33 |
| Monitor | 18 | 16.7% | 85 |
| Test Well | 6 | 5.6% | 100 |
| Irrigation | 6 | 5.6% | 240 |
| Domestic | 5 | 4.6% | 80 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 51 | 43 | 65 |
| 2010s | 29 | 100 | 61 |
| 2020s | 28 | 120 | 81 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 687052 | 2024 | 317 | — | — | Irrigation |
| 608070 | 2022 | 260 | 202 | 10 | Stock |
| 597862 | 2022 | 240 | 215 | 10 | Stock |
| 416443 | 2016 | 240 | 178 | 450 | Irrigation |
| 416442 | 2016 | 240 | 178 | 200 | Irrigation |
| 491514 | 2016 | 223 | 170 | 500 | Domestic |
| 637375 | 2023 | 220 | 178 | — | Irrigation |
| 636701 | 2023 | 220 | 172 | 15 | Stock |
| 514152 | 2019 | 220 | 170 | 4 | Stock |
| 33842 | 2004 | 212 | — | 500 | Irrigation |
Every figure on this site is a median, never an average. On reported yield the average is twice the median, because a handful of entries are typing errors — the largest reads 2,200,100 gallons per minute against 30,078 for the next one. Yields above 3,000 gpm (136 wells, 0.045%) and depths beyond 5,000 ft (103 wells, 0.016%) are kept in the file, marked, and left out of the medians.
Drilling a well in King County?
Depth is only half the quote. What it costs depends on the rock, the casing and the pump. Tell us where and we pass the request to licensed Texas drillers.
We are nobody's agent and have no arrangement with any firm today. What we do with this.
Counties with a comparable number of reports
A sliding window, not a ranking. Every county.