# Well grid 57-21, Texas — Llano, Burnet — how deep, and through what

> 1,154 well reports in Texas state well grid 57-21, covering Llano, Burnet, Williamson. Median depth 110 ft.

## Texas well grid 57-21

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Llano County](/county/llano.md) and [Burnet County](/county/burnet.md). **1,154** reports, median depth **110 ft**.

### What you will drill through in grid 57-21

*Logged in state well grid 57-21, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 466 , **Granite Gravel** 420 , **Top Soil** 208 , **Sandy Loam** 102 , **Red Granite** 82 , **Red Granite Gravel** 73 |
| 25–50 ft | **Granite Gravel** 73 , **Red Granite** 70 , **Pink Granite** 54 , **Gravel** 41 , **Black And Red Granite** 26 , **Granite** 13 |
| 50–100 ft | **Red Granite** 69 , **Pink Granite** 53 , **Black And Red Granite** 28 , **Granite Gravel** 16 , **Granite Bedrock** 17 , **Granite** 17 |
| 100–200 ft | **Red Granite** 20 , **Pink Granite** 15 , **Grey Granite** 9 , **Fracture** 4 , **Gray Granite** 4 , **Pink Granit** 3 |
| 200–300 ft | **Red Granite** 4 , **Grey Granite** 3 , **Brown Sandstone** 2 , **Brown And Grey Sandstone** 2 , **Grey Limestone** 2 , **Black/Gray** 1 |
| 300–500 ft | **Red Sandstone** 4 , **White & Gray Limestone** 2 , **Blue Shale** 1 , **Limestone W/ River Gravel Stringers** 1 , **Red Granite** 1 , **Grey Limestone** 1 |
| 500–1000 ft | **Tan/Gray/Red S/S Hickery** 1 , **Brown Sandstone** 1 , **Brown And Grey Limestone And Sandstone** 1 , **Yellow Sandstone** 1 , **Blue Grey Limestone** 1 , **Yellow Limestone** 1 |

### Who drills here

*Licensed firms in state well grid 57-21, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Apex Drilling, Inc.](/driller/apex-drilling-inc.md) | 376 | 100 | 33 | 2002–2026 |
| [Walden Drilling Inc](/driller/walden-drilling-inc.md) | 179 | 150 | 6 | 2010–2026 |
| [Virdell Drilling Inc.](/driller/virdell-drilling-inc.md) | 178 | 100 | 23 | 2001–2019 |
| [Highland Drilling Inc.](/driller/highland-drilling-inc.md) | 122 | 150 | 20 | 2003–2012 |
| [Magill Drilling & Water Well Service, LLC](/driller/magill-drilling-water-well-service-llc.md) | 74 | 85 | 5 | 2016–2026 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 53 | 37 | — | 2009–2017 |
| [Western Water Wells](/driller/western-water-wells.md) | 31 | 200 | 20 | 2003–2023 |
| [J and J Water Wells](/driller/j-and-j-water-wells.md) | 22 | 120 | 2 | 2021–2025 |
| [Bee Cave Drilling, Inc.](/driller/bee-cave-drilling-inc.md) | 19 | 115 | 10 | 2018–2025 |
| [Vortex Drilling Partners, LP](/driller/vortex-drilling-partners-lp.md) | 15 | 9 | — | 2019–2023 |
| [Associated Drilling Inc](/driller/associated-drilling-inc.md) | 13 | 165 | 15 | 2014–2023 |
| [White Drilling Company, Inc.](/driller/white-drilling-company-inc.md) | 10 | 54 | — | 2020–2024 |
| [Texan Water](/driller/texan-water.md) | 10 | 120 | 20 | 2018–2023 |
| [WEST Drilling](/driller/west-drilling.md) | 7 | 13 | — | 2017 |
| Lewis Environmental Inc. | 7 | — | — | 2003 |
| [TOM ARNOLD DRILLING](/driller/tom-arnold-drilling.md) | 5 | 145 | 20 | 2018–2024 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 4 | 50 | — | 2022 |
| [Magill Drilling](/driller/magill-drilling.md) | 3 | 75 | — | 2015–2016 |
| [L & L Drilling Co.](/driller/l-l-drilling-co.md) | 3 | 364 | 4 | 2005–2007 |
| [Ashley Drilling & Well Service](/driller/ashley-drilling-well-service.md) | 2 | 220 | 5 | 2025 |
| [Betts Drilling](/driller/betts-drilling.md) | 2 | 47 | — | 2024 |
| [Lucy Creek Water Well Service](/driller/lucy-creek-water-well-service.md) | 2 | 110 | 40 | 2022–2024 |
| Braendle Water Well Service | 2 | 205 | 2 | 2022 |
| [Royall's Windmill & Pump](/driller/royall-s-windmill-pump.md) | 2 | 60 | 15 | 2016–2017 |
| [Western Water Wells Drilling Inc](/driller/western-water-wells-drilling-inc.md) | 2 | — | — | 2007–2015 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 918 | 79.5% | 120 |
| Irrigation | 70 | 6.1% | 95 |
| Monitor | 55 | 4.8% | 47 |
| Stock | 33 | 2.9% | 160 |
| Environmental Soil Boring | 25 | 2.2% | 15 |
| Injection | 22 | 1.9% | 37 |
| Unknown | 15 | 1.3% | 220 |
| Test Well | 13 | 1.1% | 160 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 412 | 105 | 28 |
| 2010s | 430 | 100 | 28 |
| 2020s | 312 | 120 | 30 |

### The deepest reports on file

*Deepest reports in state well grid 57-21. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 608477 | 2022 | 710 | 316 | — | Domestic |
| 686373 | 2024 | 680 | 125 | — | Stock |
| 653510 | 2023 | 680 | — | — | Stock |
| 114463 | 2007 | 680 | 249 | 20 | Domestic |
| 653974 | 2023 | 660 | 400 | — | Domestic |
| 172122 | 2004 | 640 | 194 | 25 | Domestic |
| 500436 | 2019 | 620 | 270 | — | Domestic |
| 240192 | 2011 | 600 | 109 | 7 | Domestic |
| 517461 | 2018 | 565 | 242 | 20 | Domestic |
| 516067 | 2018 | 565 | 190 | 30 | Domestic |

Every figure here comes from a report a licensed driller filed on the day the work ended — sometimes decades ago. It describes what was found then, not what a well yields today, and it is not a statement that any well is sound, potable or still in use.

### Drilling a well near grid 57-21?

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](/privacy.md).

This grid falls in [Llano County](/county/llano.md), [Burnet County](/county/burnet.md), [Williamson County](/county/williamson.md).

### Grids with a comparable number of reports

- [27-20](/area/27-20.md)
- [68-13](/area/68-13.md)
- [65-08](/area/65-08.md)
- [65-40](/area/65-40.md)
- [27-11](/area/27-11.md)
- [28-45](/area/28-45.md)
- [68-45](/area/68-45.md)
- [60-53](/area/60-53.md)
- [32-02](/area/32-02.md)
- [33-17](/area/33-17.md)
- [40-50](/area/40-50.md)
- [79-64](/area/79-64.md)
- [32-03](/area/32-03.md)

---

Página: https://texas-water-wells.pages.dev/area/57-21/
Fonte: Texas Submitted Driller's Report Database — Texas Water Development Board, from reports filed with the Texas Department of Licensing and Regulation
Recolha: 2026-08-23