Water wells in Hays County, Texas
4,866 well reports on file. The median well here was taken to 450 ft and struck water at 263 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Hays County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Caliche 1,042, Top Soil 880, Topsoil 766, Gray Limestone 578, Tan Limestone 311, Brown Limestone 203 |
| 25–50 ft | Gray Limestone 264, Blue Lime 102, Tan Limestone 89, Grey Limestone 83, Blue Limestone 71, Brown Limestone 51 |
| 50–100 ft | Gray Limestone 214, Tan Limestone 133, Gray Lime 88, Grey Limestone 66, Brown Limestone 59, Light Gray Limestone 47 |
| 100–200 ft | Gray Limestone 288, Tan Limestone 217, Gray/Tan Limestone 131, Grey Limestone 104, Brown Limestone 94, Lost Returns 96 |
| 200–300 ft | Gray Limestone 244, Tan Limestone 227, Gray/Tan Limestone 124, Grey Limestone 77, Brown Limestone 67, White Limestone 76 |
| 300–500 ft | Gray Limestone 384, Tan Limestone 389, Brown Limestone 181, Gray/Tan Limestone 155, Gray Clay 153, Grey Limestone 133 |
| 500–1000 ft | Gray Limestone 245, Tan Limestone 183, Gray Clay 164, Red Sandstone 134, Brown Limestone 112, Gray/Tan Limestone 96 |
| 1000–5000 ft | Cow Creek 3, Clay 1, Gray Limestone 2, Hammett Shale 3, Grey / Tan Limestone Mix 1, Tan Limestone 2 |
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 Hays County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 3,407 | 70.0% | 510 |
| Environmental Soil Boring | 546 | 11.2% | 15 |
| Monitor | 478 | 9.8% | 30 |
| Irrigation | 109 | 2.2% | 560 |
| Test Well | 77 | 1.6% | 360 |
| Public Supply | 59 | 1.2% | 630 |
| Stock | 49 | 1.0% | 470 |
| Closed-Loop Geothermal | 47 | 1.0% | 300 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1990s | 4 | 405 | 204 |
| 2000s | 1,748 | 500 | 260 |
| 2010s | 1,998 | 425 | 248 |
| 2020s | 1,116 | 430 | 307 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 596155 | 2021 | 1,700 | 153 | 130 | Public Supply |
| 527505 | 2019 | 1,700 | 132 | 170 | Public Supply |
| 527500 | 2019 | 1,700 | 136 | 170 | Public Supply |
| 575596 | 2021 | 1,655 | 155 | 95 | Public Supply |
| 719376 | 2026 | 1,650 | 367 | — | Public Supply |
| 473734 | 2018 | 1,620 | 196 | 115 | Public Supply |
| 453228 | 2017 | 1,460 | 225 | — | Monitor |
| 550183 | 2020 | 1,425 | 125 | 500 | Public Supply |
| 310397 | 2012 | 1,410 | 232 | — | Test Well |
| 218105 | 2010 | 1,220 | 245 | 115 | 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 Hays 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.