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

> 658 well reports filed in Zavala County since 2001. Median depth 320 ft, water struck at 264 ft, median yield 55 gpm.

## Water wells in Zavala County, Texas

**658** well reports on file. The median well here was taken to **320 ft** and struck water at **264 ft** — against 180 ft and 80 ft across Texas.

### What you will drill through in Zavala County

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

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Top Soil** 80 , **Yellow Clay** 72 , **Topsoil** 54 , **Surface** 52 , **Shale** 36 , **Brown Clay** 35 |
| 25–50 ft | **Yellow Clay** 21 , **Clay** 21 , **Gray Shale** 14 , **Gray Sandy Shale** 13 , **Gravel** 13 , **Blue Shale** 9 |
| 50–100 ft | **Gray Sandy Shale** 31 , **Shale** 30 , **Gray Shale** 25 , **Blue Shale** 19 , **Blue Clay** 10 , **Clay** 10 |
| 100–200 ft | **Shale** 32 , **Gray Shale** 22 , **Sand** 22 , **Gray Sand** 21 , **Gray Sandy Shale** 17 , **Blue Shale** 18 |
| 200–300 ft | **Sand** 34 , **Shale** 22 , **Blue Shale** 22 , **Gray Shale** 20 , **Sandy Shale** 16 , **Carrizo Sand** 10 |
| 300–500 ft | **Shale** 63 , **Sand** 58 , **Sandy Shale** 28 , **Gray Shale** 21 , **Blue Shale** 16 , **Blue Clay** 8 |
| 500–1000 ft | **Shale** 40 , **Sand** 41 , **Carrizo Sand** 26 , **Sandy Shale** 13 , **Sand (Carrizo)** 11 , **Sand/Shale** 10 |
| 1000–5000 ft | **Shale** 26 , **Carrizo Sand** 19 , **Sand** 12 , **Carrizo** 11 , **Sandy Shale** 7 , **Gray Clay** 7 |

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 Zavala County

*Licensed firms in Zavala County, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [SPURGEON DRILLING CO.](/driller/spurgeon-drilling-co.md) | 101 | 250 | 25 | 2001–2021 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 93 | 20 | — | 2008–2017 |
| [McKinley Drilling](/driller/mckinley-drilling.md) | 73 | 986 | 800 | 1985–2026 |
| [Dennis Drilling Company](/driller/dennis-drilling-company.md) | 46 | 665 | 500 | 2004–2024 |
| [Bull's Eye Services, LLC](/driller/bull-s-eye-services-llc.md) | 38 | 1,650 | 300 | 2011–2022 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 33 | 10 | — | 2023–2025 |
| [Cross Country Drilling](/driller/cross-country-drilling.md) | 32 | 225 | 15 | 2006–2026 |
| [Cruz Drilling](/driller/cruz-drilling.md) | 25 | 400 | 55 | 2003–2013 |
| [Wilson Drilling, Inc.](/driller/wilson-drilling-inc.md) | 21 | 200 | 35 | 2003–2009 |
| [SHEPHERD DRILLING](/driller/shepherd-drilling.md) | 20 | 665 | 25 | 2003–2024 |
| [Gainco, Inc.](/driller/gainco-inc.md) | 17 | — | — | 2014 |
| [Wilson Drilling and Pump Company](/driller/wilson-drilling-and-pump-company.md) | 16 | 360 | 50 | 2012–2021 |
| [BULLS EYE SERVICES LLC](/driller/bulls-eye-services-llc.md) | 12 | 545 | 50 | 2011–2024 |
| [Sunbelt Industrial Services](/driller/sunbelt-industrial-services.md) | 12 | 5 | — | 2009 |
| [Select Drilling Services, LLC.](/driller/select-drilling-services-llc.md) | 11 | 48 | — | 2014 |
| [Geoprojects International, Inc.](/driller/geoprojects-international-inc.md) | 10 | 10 | — | 2006 |
| [Artesia Drilling](/driller/artesia-drilling.md) | 8 | 1,620 | 125 | 2017–2021 |
| [I&I Pump Service](/driller/i-i-pump-service.md) | 7 | 200 | 5 | 2010–2016 |
| ALPHA & OMEGA DRILLING SREVICES | 6 | 25 | — | 2017 |
| [Water Well Services, Inc.](/driller/water-well-services-inc.md) | 6 | 1,150 | 800 | 2011–2016 |
| [RB Environmental LLC](/driller/rb-environmental-llc.md) | 6 | 35 | — | 2013 |
| C.W.DRILLING CO. | 6 | 560 | 1,395 | 2003–2004 |
| [Ivy Water Well Drilling, Inc.](/driller/ivy-water-well-drilling-inc.md) | 4 | 320 | 20 | 2018–2019 |
| [TERO DRILLING LLC](/driller/tero-drilling-llc.md) | 4 | 25 | — | 2018 |
| [Burleson Services, Inc.](/driller/burleson-services-inc.md) | 4 | 1,309 | 320 | 2010–2011 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Environmental Soil Boring | 159 | 24.2% | 10 |
| Domestic | 138 | 21.0% | 400 |
| Stock | 138 | 21.0% | 300 |
| Irrigation | 103 | 15.7% | 650 |
| Rig Supply | 50 | 7.6% | 1,500 |
| Monitor | 41 | 6.2% | 42 |
| Fracking Supply | 15 | 2.3% | 1,681 |
| Public Supply | 6 | 0.9% | 916 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1980s | 2 | 1,058 | 319 |
| 2000s | 166 | 220 | 160 |
| 2010s | 376 | 340 | 275 |
| 2020s | 114 | 395 | 320 |

### The deepest reports on file

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

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 350374 | 2013 | 1,950 | — | — | Rig Supply |
| 210577 | 2010 | 1,910 | 305 | 300 | Rig Supply |
| 543573 | 2020 | 1,900 | 590 | — | Fracking Supply |
| 352561 | 2014 | 1,890 | 460 | 200 | Fracking Supply |
| 543566 | 2020 | 1,870 | 606 | — | Fracking Supply |
| 542543 | 2015 | 1,861 | — | — | Irrigation |
| 648225 | 2023 | 1,860 | 688 | 800 | Rig Supply |
| 360621 | 2014 | 1,860 | 500 | 420 | Fracking Supply |
| 352168 | 2014 | 1,854 | 540 | 210 | Fracking Supply |
| 524254 | 2019 | 1,853 | 350 | — | Rig Supply |

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 Zavala 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

- [Crane](/county/crane.md)
- [Childress](/county/childress.md)
- [Maverick](/county/maverick.md)
- [Hardeman](/county/hardeman.md)
- [Somervell](/county/somervell.md)
- [Crosby](/county/crosby.md)
- [Titus](/county/titus.md)
- [Fisher](/county/fisher.md)
- [Swisher](/county/swisher.md)
- [Garza](/county/garza.md)
- [Schleicher](/county/schleicher.md)
- [Hopkins](/county/hopkins.md)
- [Hall](/county/hall.md)

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

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