Water wells in Coryell County, Texas
904 well reports on file. The median well here was taken to 400 ft and struck water at 277 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Coryell County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Overburden 202, Dark Brown Clay 133, Gray Limestone 127, Topsoil 99, Tan Limestone 44, Gray Shale 59 |
| 25–50 ft | Gray Limestone 58, Gray Shale 27, Grey Shale 16, Gray Lime 15, Paluxy Sand 13, Dark Gray Clay And Gray Limestone 10 |
| 50–100 ft | Gray Limestone 28, Gray Shale 20, Gray Lime 15, Sandy Shale 13, Paluxy Sand 7, Paluxy 5 |
| 100–200 ft | Gray Limestone 18, Sandy Shale 15, Gray Shale 12, Shale 10, Paluxy Sand 8, Grey Shale 8 |
| 200–300 ft | Sandy Shale 25, Gray Limestone 19, Dark Shale 15, Gray Sandstone 9, Tan Limestone 13, Gray Shale 12 |
| 300–500 ft | Red Clay 98, Red Sandstone 49, Sand 40, Brown Lime 41, Brown Limestone 33, Red Shale 23 |
| 500–1000 ft | Red Clay 38, Sand 23, Red Shale 24, Red Sandstone 22, Yellow Clay 19, Yellow Shale 19 |
| 1000–5000 ft | Yellow Limestone 3, Yellow Clay 2, Sandy Clay 1, Red Sandstone With Sand Stringers 1, Sand, Gravel, Sandy Blue Clay 1, Yellow Shale, Clay 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 Coryell County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 487 | 53.9% | 490 |
| Injection | 125 | 13.8% | 21 |
| Monitor | 123 | 13.6% | 25 |
| Stock | 74 | 8.2% | 525 |
| Environmental Soil Boring | 55 | 6.1% | 14 |
| Closed-Loop Geothermal | 9 | 1.0% | 250 |
| Other | 9 | 1.0% | 15 |
| Test Well | 9 | 1.0% | 20 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 260 | 400 | 295 |
| 2010s | 231 | 450 | 338 |
| 2020s | 413 | 373 | 36 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 664781 | 2024 | 4,802 | — | — | Domestic |
| 418258 | 2015 | 1,170 | — | 100 | Public Supply |
| 534594 | 2020 | 1,143 | 700 | 100 | Stock |
| 562122 | 2020 | 1,142 | 780 | — | Domestic |
| 616746 | 2022 | 1,060 | 714 | 18 | Domestic |
| 616744 | 2022 | 1,060 | 722 | 18 | Domestic |
| 451365 | 2016 | 1,040 | 702 | 60 | Domestic |
| 392201 | 2015 | 1,040 | 712 | 15 | Irrigation |
| 390922 | 2015 | 1,040 | 760 | — | Irrigation |
| 181864 | 2005 | 1,035 | 560 | 30 | 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 Coryell 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.