Water wells in Karnes County, Texas
2,671 well reports on file. The median well here was taken to 280 ft and struck water at 100 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Karnes County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Clay 594, Sand 357, Surface 281, Caliche 241, Sandy Loam 234, Top Soil 197 |
| 25–50 ft | Clay 208, Sand 123, Shale 50, Clay & Shale 28, Gray Clay 20, Rock 16 |
| 50–100 ft | Clay 305, Sand 271, Shale 94, Rock 47, Clay & Shale 42, Sandstone 29 |
| 100–200 ft | Sand 529, Clay 446, Shale 176, Rock 91, Clay & Shale 98, Blue Clay 28 |
| 200–300 ft | Sand 420, Clay 324, Shale 155, Rock 80, Clay & Shale 49, Layered Sand & Shale 33 |
| 300–500 ft | Sand 331, Clay 238, Shale 152, Rock 58, Clay & Shale 43, Layered Sand & Shale 42 |
| 500–1000 ft | Sand 109, Clay 93, Shale 73, Rock 14, Layered Sand & Shale 21, Sand & Shale 16 |
| 1000–5000 ft | Shale 32, Sand 43, Sandy Shale 20, Clay 12, Carrizo Sand 9, Gray Shale 5 |
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 Karnes County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 666 | 24.9% | 360 |
| Stock | 629 | 23.5% | 320 |
| Rig Supply | 479 | 17.9% | 420 |
| Environmental Soil Boring | 412 | 15.4% | 10 |
| Monitor | 224 | 8.4% | 35 |
| Industrial | 122 | 4.6% | 640 |
| Fracking Supply | 91 | 3.4% | 1,350 |
| Irrigation | 34 | 1.3% | 504 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 419 | 290 | 90 |
| 2010s | 1,743 | 265 | 100 |
| 2020s | 509 | 300 | 119 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 510067 | 2019 | 4,870 | 99 | 800 | Fracking Supply |
| 574590 | 2021 | 4,855 | 200 | 1,100 | Fracking Supply |
| 272062 | 2011 | 4,800 | 75 | — | Fracking Supply |
| 474237 | 2018 | 4,753 | 130 | 1,700 | Rig Supply |
| 387133 | 2014 | 4,711 | 80 | 940 | Fracking Supply |
| 291088 | 2011 | 4,700 | 87 | 300 | Rig Supply |
| 274404 | 2011 | 4,700 | 250 | — | Rig Supply |
| 551394 | 2020 | 4,650 | 139 | 1,900 | Industrial |
| 284962 | 2012 | 4,650 | 120 | 300 | Industrial |
| 280155 | 2012 | 4,648 | 95 | 1,000 | Fracking Supply |
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 Karnes 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.