# Water wells in Trinity County, Texas — how deep, and through what

> 435 well reports filed in Trinity County since 2001. Median depth 250 ft, water struck at 60 ft, median yield 20 gpm.

## Water wells in Trinity County, Texas

**435** well reports on file. The median well here was taken to **250 ft** and struck water at **60 ft** — against 180 ft and 80 ft across Texas.

### What you will drill through in Trinity County

*Logged in Trinity County, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Sand** 103 , **Clay** 81 , **Brown Clay** 52 , **Topsoil** 40 , **Tan Clay** 29 , **Top Bit Soil** 36 |
| 25–50 ft | **Sand** 42 , **Gray Shale** 41 , **Blue Clay** 31 , **Clay** 29 , **Lignite** 20 , **Gray Clay** 11 |
| 50–100 ft | **Sand** 73 , **Blue Clay** 45 , **Clay** 47 , **Gray Shale** 38 , **Rock** 30 , **Lignite** 28 |
| 100–200 ft | **Sand** 139 , **Clay** 54 , **Blue Clay** 44 , **Gray Shale** 44 , **Rock** 44 , **Shale** 31 |
| 200–300 ft | **Sand** 100 , **Clay** 43 , **Blue Clay** 28 , **Gray Shale** 26 , **Rock** 25 , **Shale** 18 |
| 300–500 ft | **Sand** 72 , **Clay** 26 , **Rock** 37 , **Shale** 21 , **Blue Clay** 13 , **Gray Shale** 16 |
| 500–1000 ft | **Rock** 4 , **Shale** 4 , **Blue Clay** 5 , **Gray Shale** 4 , **Sand** 3 , **Blue Clay/Lignite** 3 |
| 1000–5000 ft | **Sandy Shale** 1 , **Shale With Sand Lenses** 1 , **Sand Fine To Fine Medium** 1 , **Gray Shale** 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 Trinity County

*Licensed firms in Trinity County, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [English Drilling Inc.](/driller/english-drilling-inc.md) | 67 | 237 | 12 | 2003–2026 |
| [Holly Water Wells](/driller/holly-water-wells.md) | 55 | 280 | 15 | 2003–2026 |
| [Ballard Water Well Co. LLC](/driller/ballard-water-well-co-llc.md) | 42 | 285 | 40 | 2003–2026 |
| [Geothermal Drilling inc](/driller/geothermal-drilling-inc.md) | 24 | 330 | 15 | 2016–2026 |
| [Chrisley Water Well Drilling](/driller/chrisley-water-well-drilling.md) | 23 | 150 | 12 | 2006–2013 |
| [Gray's Water Well Service](/driller/gray-s-water-well-service.md) | 22 | 220 | 40 | 2004–2014 |
| [BEST DRILLING SERVICES, INC.](/driller/best-drilling-services-inc.md) | 16 | 25 | — | 2007–2017 |
| [Gray's Water Well Svc.](/driller/gray-s-water-well-svc.md) | 16 | 300 | 20 | 2010–2014 |
| [Grays Water Well Svc.](/driller/grays-water-well-svc.md) | 11 | 240 | 20 | 2011–2019 |
| [WANDA DRILLING & WATER DEV INC](/driller/wanda-drilling-water-dev-inc.md) | 9 | 186 | 50 | 2011–2026 |
| [Fas-Line Services Inc.](/driller/fas-line-services-inc.md) | 9 | 370 | 65 | 2013–2017 |
| [Bell's Drilling Service](/driller/bell-s-drilling-service.md) | 8 | 225 | 30 | 2019–2024 |
| [Pinnergy, LTD](/driller/pinnergy-ltd.md) | 8 | 400 | 60 | 2009–2016 |
| [Sunbelt Industrial Services](/driller/sunbelt-industrial-services.md) | 8 | 20 | — | 2013–2016 |
| [Gray's Water Well](/driller/gray-s-water-well.md) | 8 | 272 | 20 | 2003–2014 |
| [Grays Water Well](/driller/grays-water-well.md) | 7 | 309 | 80 | 2007–2009 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 6 | — | — | 2014–2015 |
| [Smithers Water Wells](/driller/smithers-water-wells.md) | 5 | 230 | 10 | 2004–2021 |
| [Hydrex Environmental, Inc.](/driller/hydrex-environmental-inc.md) | 5 | 16 | — | 2001–2013 |
| [J&S Drilling, LLC](/driller/j-s-drilling-llc.md) | 4 | 380 | 40 | 2019–2024 |
| [Weisinger Incorporated](/driller/weisinger-incorporated.md) | 4 | 500 | 214 | 2013–2023 |
| [Strata Core Drilling Co.](/driller/strata-core-drilling-co.md) | 4 | — | — | 2009 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 4 | — | — | 2009 |
| [Master Monitoring Services, Inc.](/driller/master-monitoring-services-inc.md) | 4 | 25 | — | 2006–2007 |
| [M&M Water Well, LLC](/driller/m-m-water-well-llc.md) | 3 | 148 | 37 | 2016–2023 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 299 | 68.7% | 258 |
| Monitor | 51 | 11.7% | 25 |
| Public Supply | 20 | 4.6% | 475 |
| Rig Supply | 20 | 4.6% | 300 |
| Irrigation | 16 | 3.7% | 180 |
| Stock | 12 | 2.8% | 370 |
| Test Well | 12 | 2.8% | 224 |
| Environmental Soil Boring | 3 | 0.7% | 16 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 131 | 216 | 51 |
| 2010s | 190 | 255 | 60 |
| 2020s | 114 | 300 | 75 |

### The deepest reports on file

*Deepest reports in Trinity County. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 155376 | 2003 | 1,297 | 70 | 50 | Test Well |
| 350875 | 2013 | 960 | — | — | Domestic |
| 350874 | 2013 | 960 | — | — | Domestic |
| 350872 | 2013 | 960 | — | — | Domestic |
| 350858 | 2013 | 960 | — | — | Domestic |
| 190898 | 2006 | 898 | — | 150 | Public Supply |
| 361870 | 2014 | 797 | 200 | 125 | Rig Supply |
| 350873 | 2013 | 740 | — | — | Domestic |
| 298293 | 2012 | 660 | 125 | 60 | Rig Supply |
| 315454 | 2011 | 615 | 75 | 20 | 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 Trinity 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](/privacy.md).

### Counties with a comparable number of reports

- [Kenedy](/county/kenedy.md)
- [Armstrong](/county/armstrong.md)
- [Dickens](/county/dickens.md)
- [Marion](/county/marion.md)
- [Kinney](/county/kinney.md)
- [Sabine](/county/sabine.md)
- [Borden](/county/borden.md)
- [Sterling](/county/sterling.md)
- [Lamar](/county/lamar.md)
- [McMullen](/county/mcmullen.md)
- [Jeff Davis](/county/jeff-davis.md)
- [Oldham](/county/oldham.md)
- [Falls](/county/falls.md)

A sliding window, not a ranking. [Every county](/county.md).

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Página: https://texas-water-wells.pages.dev/county/trinity/
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