Water wells in Guadalupe County, Texas
2,725 well reports on file. The median well here was taken to 180 ft and struck water at 65 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Guadalupe County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Sandy Clay 480, Top Soil 484, Sand 382, Clay 374, Gravel 319, Yellow Clay 201 |
| 25–50 ft | Blue Clay 336, Gravel 167, Sand 160, Blue Shale 135, Rock 115, Clay 109 |
| 50–100 ft | Sand 422, Rock 294, Shale 231, Blue Clay 208, Clay 142, Blue Shale 129 |
| 100–200 ft | Sand 763, Rock 539, Shale 399, Clay 286, Blue Clay 125, Sandy Clay 111 |
| 200–300 ft | Sand 624, Rock 404, Shale 280, Clay 257, Clay & Rocks 85, Sandy Clay 64 |
| 300–500 ft | Sand 301, Clay 199, Rock 185, Shale 111, Clay & Rocks 33, Blue Clay 33 |
| 500–1000 ft | Clay 15, Sand 13, Rock 11, Shale 6, Gray Clay 2, Sand & Sandy Clay 2 |
| 1000–5000 ft | Sand 2, Shale 1, Sand / Clay 1, Clay 2, Clay / Sand 1, Clay/Shale, Med And Fine Sand 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 Guadalupe County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 1,752 | 64.3% | 260 |
| Environmental Soil Boring | 387 | 14.2% | 13 |
| Monitor | 343 | 12.6% | 50 |
| Stock | 123 | 4.5% | 320 |
| Irrigation | 47 | 1.7% | 310 |
| Test Well | 25 | 0.9% | 129 |
| Other | 23 | 0.8% | 60 |
| Public Supply | 13 | 0.5% | 907 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 725 | 240 | 62 |
| 2010s | 981 | 170 | 68 |
| 2020s | 1,019 | 130 | 65 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 675749 | 2022 | 2,100 | 130 | 800 | Public Supply |
| 433363 | 2016 | 1,602 | 92 | 1,511 | Public Supply |
| 433367 | 2016 | 1,580 | 116 | 1,511 | Public Supply |
| 645179 | 2023 | 1,042 | 143 | 375 | Public Supply |
| 531111 | 2024 | 947 | 27 | 1,350 | Public Supply |
| 531123 | 2019 | 945 | 27 | — | Monitor |
| 482564 | 2018 | 945 | 39 | — | Monitor |
| 675748 | 2022 | 910 | 150 | 500 | Public Supply |
| 675746 | 2022 | 907 | 127 | 500 | Public Supply |
| 675747 | 2022 | 905 | 145 | 500 | Public 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 Guadalupe 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.