Water wells in Blanco County, Texas
2,845 well reports on file. The median well here was taken to 385 ft and struck water at 142 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Blanco County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Top Soil 623, Brown Topsoil 514, Topsoil 376, Caliche 270, Tan Limestone 244, Tan Ls 205 |
| 25–50 ft | Gray Limestone 122, Gray Shale & Clay 104, Brown Limestone 47, Gray Clay & Shale 42, Gray Tan Ls 38, Gray Shale 39 |
| 50–100 ft | Gray Limestone 154, Brown Limestone 76, Tan Limestone 70, Gray Shale & Clay 66, Gray Shale 43, Grey Limestone 34 |
| 100–200 ft | Gray Limestone 210, Brown Limestone 136, Tan Limestone 100, Water 1 Gpm 67, Gray Shale & Clay 67, Gray Shale 65 |
| 200–300 ft | Gray Limestone 179, Brown Limestone 95, Tan Limestone 73, Water 1 Gpm 69, Gray Shale 69, Water 2 Gpm 60 |
| 300–500 ft | Gray Limestone 182, Gray Clay 134, Td 111, Brown Limestone 94, Tan Limestone 75, Water 2 Gpm 65 |
| 500–1000 ft | Td 63, Gray Limestone 48, Gray Clay 26, Brown Limestone 19, Gray Ls 18, Water 2 Gpm 17 |
| 1000–5000 ft | Gray Limestone 4, Red Granite 3, White Sandy Limestone With Blue Shale 1, Water 2, Brown Limestone 1, 5+ Gpm 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 Blanco County
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 2,492 | 87.6% | 400 |
| Stock | 89 | 3.1% | 300 |
| Test Well | 81 | 2.8% | 305 |
| Monitor | 57 | 2.0% | 35 |
| Environmental Soil Boring | 44 | 1.5% | 7 |
| Irrigation | 26 | 0.9% | 358 |
| Unknown | 24 | 0.8% | 340 |
| Public Supply | 20 | 0.7% | 400 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1980s | 1 | 150 | 26 |
| 1990s | 1 | 280 | — |
| 2000s | 927 | 340 | 126 |
| 2010s | 911 | 364 | 136 |
| 2020s | 1,005 | 410 | 169 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 177649 | 2009 | 3,232 | 255 | 30 | Domestic |
| 433525 | 2016 | 1,729 | 300 | 4 | Domestic |
| 444037 | 2017 | 1,664 | 70 | 85 | Domestic |
| 680732 | 2024 | 1,609 | 164 | — | Domestic |
| 689819 | 2025 | 1,520 | 145 | 20 | Stock |
| 401876 | 2015 | 1,460 | — | — | Domestic |
| 688049 | 2025 | 1,400 | 186 | 20 | Stock |
| 685763 | 2024 | 1,369 | 285 | 30 | Domestic |
| 408092 | 2015 | 1,368 | 85 | 50 | Domestic |
| 410049 | 2015 | 1,346 | 18 | — | 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 Blanco 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.