Water wells in Llano County, Texas
4,143 well reports on file. The median well here was taken to 160 ft and struck water at 33 ft — against 180 ft and 80 ft across Texas.
What you will drill through in Llano County
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Topsoil 2,647, Granite Gravel 639, Red Granite 526, Red Sandy Clay 360, Top Soil 302, Brown Clay & Gravel 262 |
| 25–50 ft | Red Granite 230, Gray Granite 130, Red & Black Metamorphic 110, Pink Granite 59, Granite Gravel 55, Black And Red Granite 53 |
| 50–100 ft | Red Granite 197, Gray Granite 75, Red Metamorphic 61, Pink Granite 50, Red & Black Metamorphic 54, Black Metamorphic 48 |
| 100–200 ft | Red Granite 91, Red Metamorphic 68, Gray Granite 54, Black Granite 44, Black Metamorphic 42, Red & Black Metamorphic 40 |
| 200–300 ft | Red Granite 28, Gray Granite 15, Water 1 Gpm 11, Red Metamorphic 12, Black Granite 10, Grey Granite 10 |
| 300–500 ft | Red Sandstone 12, Red Granite 7, Black Granite 4, Water 1 Gpm 5, Brown Sandstone 3, Grey Granite 3 |
| 500–1000 ft | Gray Sandstone 2, Brown Sandstone 2, Red Granite 2, Gray Limestone 2, Red Sandstone 2, Blue Shale 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 Llano County
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| Virdell Drilling Inc. | 1,461 | 140 | 10 | 2001–2019 |
| Walden Drilling Inc | 818 | 160 | 5 | 2009–2026 |
| Magill Drilling & Water Well Service, LLC | 597 | 165 | 6 | 2015–2026 |
| Apex Drilling, Inc. | 358 | 182 | 12 | 2002–2026 |
| Highland Drilling Inc. | 253 | 180 | 15 | 2003–2013 |
| Vortex Drilling, Inc. | 137 | 23 | — | 2006–2025 |
| Bee Cave Drilling, Inc. | 117 | 200 | 10 | 2003–2026 |
| L & L Drilling Co. | 100 | 285 | 8 | 2002–2026 |
| Magill Drilling | 45 | 160 | 5 | 2015–2016 |
| Western Water Wells | 34 | 240 | 10 | 2004–2023 |
| Ashley Drilling & Well Service | 22 | 160 | 15 | 2023–2026 |
| Associated Drilling Inc | 19 | 205 | 15 | 2007–2025 |
| Magill Well Service | 16 | 180 | 3 | 2002–2015 |
| Geoprojects International, Inc. | 16 | 18 | 175 | 2002–2005 |
| Vortex Drilling Partners, LP | 15 | 9 | — | 2019–2023 |
| J and J Water Wells | 12 | 200 | — | 2021–2025 |
| BoreTek LLC | 11 | 260 | 5 | 2024–2026 |
| Texan Water | 11 | 200 | 15 | 2018–2024 |
| Envirotech Drilling Services LLC | 11 | 25 | — | 2019–2022 |
| brian Walden drilling | 11 | — | 50 | 2011–2012 |
| White Drilling Company, Inc. | 10 | 54 | — | 2020–2024 |
| Centex Pump & Supply, Inc. | 8 | 280 | 20 | 2018–2026 |
| aquatech solutions | 7 | 220 | 15 | 2023 |
| Lewis Environmental Inc. | 7 | — | — | 2003 |
| TOM ARNOLD DRILLING | 6 | 305 | 15 | 2018–2022 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 3,080 | 74.3% | 160 |
| Stock | 655 | 15.8% | 160 |
| Environmental Soil Boring | 101 | 2.4% | 10 |
| Irrigation | 98 | 2.4% | 140 |
| Monitor | 82 | 2.0% | 40 |
| Unknown | 54 | 1.3% | 200 |
| Injection | 26 | 0.6% | 40 |
| Test Well | 24 | 0.6% | 145 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 1,295 | 140 | 30 |
| 2010s | 1,689 | 145 | 36 |
| 2020s | 1,159 | 180 | 36 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 277149 | 2012 | 800 | 80 | 50 | Domestic |
| 680805 | 2024 | 750 | 483 | 5 | Domestic |
| 608477 | 2022 | 710 | 316 | — | Domestic |
| 416598 | 2016 | 707 | 49 | — | Domestic |
| 172077 | 2009 | 705 | 320 | 16 | Domestic |
| 686373 | 2024 | 680 | 125 | — | Stock |
| 653510 | 2023 | 680 | — | — | Stock |
| 114463 | 2007 | 680 | 249 | 20 | Domestic |
| 653974 | 2023 | 660 | 400 | — | Domestic |
| 484518 | 2018 | 660 | 250 | 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 Llano 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.
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Counties with a comparable number of reports
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