Water wells in Trinity County, Texas
435 well reports on file. The median well here was taken to 250 ft and struck water at 60 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Trinity County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Sand 103, Clay 81, Brown Clay 52, Topsoil 40, Tan Clay 29, Top Bit Soil 36 |
| 25–50 ft | Sand 42, Gray Shale 41, Blue Clay 31, Clay 29, Lignite 20, Gray Clay 11 |
| 50–100 ft | Sand 73, Blue Clay 45, Clay 47, Gray Shale 38, Rock 30, Lignite 28 |
| 100–200 ft | Sand 139, Clay 54, Blue Clay 44, Gray Shale 44, Rock 44, Shale 31 |
| 200–300 ft | Sand 100, Clay 43, Blue Clay 28, Gray Shale 26, Rock 25, Shale 18 |
| 300–500 ft | Sand 72, Clay 26, Rock 37, Shale 21, Blue Clay 13, Gray Shale 16 |
| 500–1000 ft | Rock 4, Shale 4, Blue Clay 5, Gray Shale 4, Sand 3, Blue Clay/Lignite 3 |
| 1000–5000 ft | Sandy Shale 1, Shale With Sand Lenses 1, Sand Fine To Fine Medium 1, Gray Shale 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 Trinity County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 299 | 68.7% | 258 |
| Monitor | 51 | 11.7% | 25 |
| Public Supply | 20 | 4.6% | 475 |
| Rig Supply | 20 | 4.6% | 300 |
| Irrigation | 16 | 3.7% | 180 |
| Stock | 12 | 2.8% | 370 |
| Test Well | 12 | 2.8% | 224 |
| Environmental Soil Boring | 3 | 0.7% | 16 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 131 | 216 | 51 |
| 2010s | 190 | 255 | 60 |
| 2020s | 114 | 300 | 75 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 155376 | 2003 | 1,297 | 70 | 50 | Test Well |
| 350875 | 2013 | 960 | — | — | Domestic |
| 350874 | 2013 | 960 | — | — | Domestic |
| 350872 | 2013 | 960 | — | — | Domestic |
| 350858 | 2013 | 960 | — | — | Domestic |
| 190898 | 2006 | 898 | — | 150 | Public Supply |
| 361870 | 2014 | 797 | 200 | 125 | Rig Supply |
| 350873 | 2013 | 740 | — | — | Domestic |
| 298293 | 2012 | 660 | 125 | 60 | Rig Supply |
| 315454 | 2011 | 615 | 75 | 20 | Domestic |
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 Trinity 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.