# Well grid 87-20, Texas — Starr — how deep, and through what

> 110 well reports in Texas state well grid 87-20, covering Starr. Median depth 375 ft.

## Texas well grid 87-20

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Starr County](/county/starr.md). **110** reports, median depth **375 ft**.

### What you will drill through in grid 87-20

*Logged in state well grid 87-20, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Caliche** 37 , **Top Soil** 28 , **Ft Sand, Brown To Light Brown , Very Fine-Grained, Unconsoli** 10 , **Ft Sand Brown To Light Brown, Very Fine-Grained, Unconsolida** 10 , **Ft Sand Orangish-Brown, Very Fine-Grained, Unconsolidated, D** 10 , **Clay** 9 |
| 25–50 ft | **Clay** 12 , **Red Clay** 3 , **Clay; Tan** 3 , **Sandy Clay; Tan** 3 , **Sandy Clay; Brown** 3 , **Sand** 2 |
| 50–100 ft | **Clay** 10 , **Sand** 8 , **Shale** 4 , **Brown Clay** 3 , **Red Clay** 3 , **Clay; Tan** 3 |
| 100–200 ft | **Clay** 19 , **Sand** 9 , **Hard Sand** 3 , **Red Clay** 3 , **Shale** 2 , **Sand/Shale** 2 |
| 200–300 ft | **Sand** 20 , **Clay** 12 , **Shale** 8 , **Fine Sand** 3 , **Sand With Clay** 2 , **Clay With Sand** 2 |
| 300–500 ft | **Sand** 24 , **Clay** 8 , **Shale** 5 , **Brown Sand** 4 , **Sand Brown** 3 , **Sand/Clay** 4 |
| 500–1000 ft | **Sand** 2 , **Clay** 2 , **Sand Clay** 1 , **Sand/Shale** 1 , **Hard Sand** 1 |

### Who drills here

*Licensed firms in state well grid 87-20, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Alpine Field Services](/driller/alpine-field-services.md) | 23 | 20 | — | 2005 |
| [Killinger's Water Well Drilling](/driller/killinger-s-water-well-drilling.md) | 17 | 430 | 30 | 2008–2023 |
| [MARAL DRILLING](/driller/maral-drilling.md) | 14 | 360 | 25 | 2004–2024 |
| [EnviroCore, Inc.](/driller/envirocore-inc.md) | 14 | 80 | — | 2009–2019 |
| [SCI](/driller/sci.md) | 11 | — | — | 2010 |
| [Cinco E Inc.](/driller/cinco-e-inc.md) | 7 | 460 | 17 | 2003–2018 |
| [R. MOLINA WATER WELL SERVICE, INC.](/driller/r-molina-water-well-service-inc.md) | 6 | 440 | 20 | 2008–2019 |
| T. Molina Waterwell LLC | 5 | 400 | 20 | 2009–2013 |
| [T Molina Water Well LLC](/driller/t-molina-water-well-llc.md) | 4 | 460 | 15 | 2015–2024 |
| [Pursley Drilling Ltd.](/driller/pursley-drilling-ltd.md) | 3 | 400 | 50 | 2007–2010 |
| Mike-N-Sons All-Terrain Well & Pump Service | 2 | 420 | 25 | 2023–2025 |
| [JEDI Drilling Contractors](/driller/jedi-drilling-contractors.md) | 2 | 80 | — | 2009 |
| Jose L Alvarado Drilling | 1 | 160 | — | 2026 |
| [J4 Water Works, LLC](/driller/j4-water-works-llc.md) | 1 | 720 | 105 | 2025 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Environmental Soil Boring | 34 | 30.9% | 20 |
| Stock | 33 | 30.0% | 420 |
| Domestic | 24 | 21.8% | 420 |
| Monitor | 16 | 14.5% | 80 |
| Other | 2 | 1.8% | 460 |
| Irrigation | 1 | 0.9% | 440 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 40 | 20 | 110 |
| 2010s | 52 | 400 | 140 |
| 2020s | 18 | 420 | 130 |

### The deepest reports on file

*Deepest reports in state well grid 87-20. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 692573 | 2025 | 720 | 123 | 105 | Stock |
| 437439 | 2016 | 590 | 140 | 20 | Domestic |
| 325318 | 2013 | 580 | 122 | 20 | Domestic |
| 584920 | 2021 | 550 | 148 | 50 | Stock |
| 452993 | 2017 | 540 | 200 | 18 | Stock |
| 78668 | 2004 | 540 | 30 | — | Domestic |
| 645149 | 2023 | 525 | 167 | — | Domestic |
| 645142 | 2023 | 505 | — | 40 | Domestic |
| 488646 | 2018 | 500 | 160 | 17 | Stock |
| 469670 | 2018 | 490 | 100 | 25 | Stock |

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 87-20?

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 [Starr County](/county/starr.md).

### Grids with a comparable number of reports

- [18-43](/area/18-43.md)
- [20-24](/area/20-24.md)
- [23-06](/area/23-06.md)
- [41-15](/area/41-15.md)
- [58-45](/area/58-45.md)
- [68-64](/area/68-64.md)
- [83-09](/area/83-09.md)
- [05-26](/area/05-26.md)
- [20-31](/area/20-31.md)
- [28-60](/area/28-60.md)
- [41-18](/area/41-18.md)
- [67-03](/area/67-03.md)
- [69-32](/area/69-32.md)

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Página: https://texas-water-wells.pages.dev/area/87-20/
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