Water wells in Duval County, Texas
1,534 well reports on file. The median well here was taken to 340 ft and struck water at 115 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Duval County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Caliche 497, Top Soil 339, Surface Sand 217, Clay 105, Clachie 106, Calichie 102 |
| 25–50 ft | Clay 75, Caliche 20, Sand 19, Red Clay 18, Tan Clay 16, Shale 15 |
| 50–100 ft | Clay 178, Sand 79, Red Clay 76, Shale 46, Shale Brown 31, Fine Sand 27 |
| 100–200 ft | Clay 316, Sand 127, Shale 88, Red Clay 88, Clay W/ Sand 49, Sandy Shale 50 |
| 200–300 ft | Sand 357, Clay 150, Clay W/ Sand 87, Shale 62, Sandy Shale 62, Sand M/C 43 |
| 300–500 ft | Sand 162, Clay 152, Shale 62, Sandy Shale 50, Red Clay 31, Tan Clay 29 |
| 500–1000 ft | Sand 42, Clay 33, Feet Shale 11, Shale 14, Blue Clay 12, Gray Sand 13 |
| 1000–5000 ft | Sand 4, Clay & Shale 1, Clay 4, Silty Clay 1, Red Clay 2, Tan, Low Plasticity, Silty Clay With Fine To Medium Grained, 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 Duval County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 682 | 44.5% | 360 |
| Stock | 491 | 32.0% | 340 |
| Environmental Soil Boring | 144 | 9.4% | 8 |
| Monitor | 139 | 9.1% | 40 |
| Rig Supply | 40 | 2.6% | 380 |
| Industrial | 22 | 1.4% | 580 |
| Public Supply | 8 | 0.5% | 800 |
| Irrigation | 7 | 0.5% | 520 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 604 | 340 | 115 |
| 2010s | 615 | 340 | 112 |
| 2020s | 315 | 340 | 120 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 333624 | 2006 | 3,175 | 157 | — | Industrial |
| 132496 | 2007 | 3,055 | 148 | — | Industrial |
| 383824 | 2014 | 1,790 | 30 | 500 | Irrigation |
| 361777 | 2014 | 1,600 | 77 | 80 | Stock |
| 730890 | 2026 | 1,300 | 362 | 220 | Industrial |
| 584841 | 2021 | 1,265 | 248 | 700 | Rig Supply |
| 31114 | 2003 | 1,260 | 20 | 35 | Domestic |
| 82227 | 2005 | 1,200 | 160 | 45 | Domestic |
| 584846 | 2021 | 1,145 | 334 | 710 | Rig Supply |
| 284792 | 2012 | 1,050 | 202 | 7 | 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 Duval 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.