Water wells in Grimes County, Texas
3,279 well reports on file. The median well here was taken to 280 ft and struck water at 90 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Grimes County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Clay 1,496, Sand 511, Top Soil 123, Topsoil 123, Shale 109, Sand, Clay 86 |
| 25–50 ft | Clay 443, Sand 426, Clay, Sand 106, Sand, Clay 70, Shale 65, Blue Clay 51 |
| 50–100 ft | Clay 710, Sand 670, Shale 116, Sand, Clay 106, Rock 95, Blue Clay 66 |
| 100–200 ft | Sand 1,184, Clay 1,053, Shale 261, Rock 207, Clay, Sand 118, Blue Clay 69 |
| 200–300 ft | Sand 1,054, Clay 623, Shale 246, Rock 134, Hard Shale 50, Clay, Sand 70 |
| 300–500 ft | Sand 815, Clay 306, Shale 152, Rock 68, Blue Clay 29, Hard Shale 29 |
| 500–1000 ft | Sand 87, Clay 38, Shale 22, Rock 9, Blue Shale 2, Gray Clay 5 |
| 1000–5000 ft | Sand 3, Clay 2, Blue Shale 1, Sand & Clay 1, Shale 2, Clay/Sand 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 Grimes County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 2,469 | 75.3% | 290 |
| Monitor | 313 | 9.5% | 35 |
| Stock | 105 | 3.2% | 335 |
| Industrial | 92 | 2.8% | 405 |
| Rig Supply | 82 | 2.5% | 330 |
| Environmental Soil Boring | 78 | 2.4% | 10 |
| Irrigation | 68 | 2.1% | 380 |
| Test Well | 23 | 0.7% | 17 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1990s | 3 | 210 | 32 |
| 2000s | 915 | 290 | 92 |
| 2010s | 1,357 | 280 | 90 |
| 2020s | 1,004 | 260 | 93 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 242321 | 2008 | 2,116 | 81 | 94 | Test Well |
| 691744 | 2025 | 1,500 | 180 | 201 | Public Supply |
| 481569 | 2018 | 1,400 | 293 | 1,511 | Public Supply |
| 325789 | 2013 | 1,223 | 100 | 25 | Domestic |
| 506676 | 2019 | 1,210 | 60 | 140 | Rig Supply |
| 275557 | 2012 | 1,200 | 17 | 500 | Irrigation |
| 5045 | 2002 | 1,020 | 272 | 150 | Public Supply |
| 567018 | 2020 | 930 | 180 | 200 | Irrigation |
| 47369 | 2003 | 920 | 137 | 415 | Irrigation |
| 201143 | 2005 | 890 | 140 | 500 | Irrigation |
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 Grimes 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.