# Well grid 87-21, Texas — Starr, Hidalgo — how deep, and through what

> 166 well reports in Texas state well grid 87-21, covering Starr, Hidalgo. Median depth 110 ft.

## Texas well grid 87-21

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Starr County](/county/starr.md) and [Hidalgo County](/county/hidalgo.md). **166** reports, median depth **110 ft**.

### What you will drill through in grid 87-21

*Logged in state well grid 87-21, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Caliche** 45 , **Top Soil** 16 , **Clayey Silt & Sand, Dark To Med. Brown** 15 , **Caliche White** 14 , **Silty Sandy Clay, Med. Brown** 14 , **Topsoil** 11 |
| 25–50 ft | **Clay** 7 , **Clay Yellow** 7 , **Clay; Dark Reddish Brown** 6 , **Tan Clay** 4 , **Silty Clay; Brown** 3 , **Shale** 3 |
| 50–100 ft | **Clay** 12 , **Sand** 7 , **Red Clay** 6 , **Sandy Clay; Dark Brown** 4 , **Clay, Reddish Brown** 4 , **Clay; Reddish Brown** 4 |
| 100–200 ft | **Clay** 9 , **Sand** 8 , **Sandy Clay** 3 , **Silty/Sandy Clay; Brown** 3 , **Clay Yellow** 3 , **Red Clay** 3 |
| 200–300 ft | **Clay** 11 , **Sand** 8 , **Clay With Sand** 2 , **Brown Clay** 3 , **Sand Brown** 2 , **Fine Brown Sand** 2 |
| 300–500 ft | **Sand** 16 , **Clay** 4 , **Red Clay** 5 , **Shale** 3 , **Fine Brown Sand** 3 , **Red Clay & Sand** 2 |
| 500–1000 ft | **Brown Sand** 1 , **Sand W/Shale** 1 , **Brown Ratty Clay** 1 , **Brown Clay** 1 , **Fine Medium Brown Sand W/Clay Streaks** 1 |

### Who drills here

*Licensed firms in state well grid 87-21, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [EnviroCore, Inc.](/driller/envirocore-inc.md) | 45 | 42 | — | 2009–2021 |
| [Killinger's Water Well Drilling](/driller/killinger-s-water-well-drilling.md) | 23 | 135 | 15 | 2004–2022 |
| [JEDI Drilling Contractors](/driller/jedi-drilling-contractors.md) | 22 | 110 | — | 2005–2018 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 11 | 65 | — | 2018–2020 |
| [R. MOLINA WATER WELL SERVICE, INC.](/driller/r-molina-water-well-service-inc.md) | 11 | 260 | 25 | 2003–2017 |
| [Cinco E Inc.](/driller/cinco-e-inc.md) | 11 | 520 | 45 | 2001–2015 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 10 | 15 | — | 2009–2013 |
| [MARAL DRILLING](/driller/maral-drilling.md) | 7 | 400 | 30 | 2015–2023 |
| Mike-N-Sons All-Terrain Well & Pump Service | 6 | 300 | 38 | 2023–2025 |
| [WALKER HILL ENVIRONMENTAL INC](/driller/walker-hill-environmental-inc.md) | 6 | 130 | — | 2018–2019 |
| [Jones Environmental Drilling, Inc.](/driller/jones-environmental-drilling-inc.md) | 3 | 110 | — | 2011 |
| J.E.D.I. Drilling Contractors,Inc. | 3 | 110 | — | 2006 |
| JEDI Drilling Contactors,Inc | 2 | 109 | — | 2006–2009 |
| [Alamo1 Drilling](/driller/alamo1-drilling.md) | 1 | 130 | — | 2025 |
| Jose L Alvarado Drilling | 1 | 160 | 20 | 2026 |
| [Cascade Drilling](/driller/cascade-drilling.md) | 1 | 42 | — | 2014 |
| BELL WATERWELL SERVICE | 1 | 494 | 30 | 2011 |
| [Pursley Drilling Ltd.](/driller/pursley-drilling-ltd.md) | 1 | 440 | 50 | 2004 |
| [PAGE WATER WELL](/driller/page-water-well.md) | 1 | 500 | 100 | 2003 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Monitor | 89 | 53.6% | 70 |
| Stock | 29 | 17.5% | 300 |
| Domestic | 23 | 13.9% | 380 |
| Environmental Soil Boring | 15 | 9.0% | 15 |
| Irrigation | 8 | 4.8% | 150 |
| Industrial | 1 | 0.6% | 600 |
| Rig Supply | 1 | 0.6% | 500 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 72 | 48 | 100 |
| 2010s | 73 | 120 | 56 |
| 2020s | 21 | 200 | 80 |

### The deepest reports on file

*Deepest reports in state well grid 87-21. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 63368 | 2005 | 600 | 93 | 50 | Industrial |
| 323301 | 2013 | 585 | 54 | 40 | Stock |
| 410824 | 2015 | 580 | 167 | — | Stock |
| 59302 | 2005 | 580 | 107 | 60 | Domestic |
| 206164 | 2009 | 540 | 100 | 65 | Domestic |
| 133545 | 2007 | 540 | 150 | 30 | Domestic |
| 75305 | 2005 | 540 | 148 | 45 | Domestic |
| 492944 | 2018 | 520 | 100 | 30 | Domestic |
| 370515 | 2014 | 520 | 100 | 16 | Stock |
| 454827 | 2017 | 500 | 150 | 40 | 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 87-21?

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 [Starr County](/county/starr.md), [Hidalgo County](/county/hidalgo.md).

### Grids with a comparable number of reports

- [39-47](/area/39-47.md)
- [41-07](/area/41-07.md)
- [43-43](/area/43-43.md)
- [59-07](/area/59-07.md)
- [61-41](/area/61-41.md)
- [66-38](/area/66-38.md)
- [67-35](/area/67-35.md)
- [27-47](/area/27-47.md)
- [29-18](/area/29-18.md)
- [37-29](/area/37-29.md)
- [39-40](/area/39-40.md)
- [57-27](/area/57-27.md)
- [67-21](/area/67-21.md)

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Página: https://texas-water-wells.pages.dev/area/87-21/
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