Texas well grid 87-21
A 7.5-minute quadrangle of the Texas state well grid, mostly in Starr County and Hidalgo County. 166 reports, median depth 110 ft.
166Reports
110 ftMedian depth
60 ftWater at
25 gpmMedian yield
What you will drill through in grid 87-21
| 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
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| EnviroCore, Inc. | 45 | 42 | — | 2009–2021 |
| Killinger's Water Well Drilling | 23 | 135 | 15 | 2004–2022 |
| JEDI Drilling Contractors | 22 | 110 | — | 2005–2018 |
| Envirotech Drilling Services LLC | 11 | 65 | — | 2018–2020 |
| R. MOLINA WATER WELL SERVICE, INC. | 11 | 260 | 25 | 2003–2017 |
| Cinco E Inc. | 11 | 520 | 45 | 2001–2015 |
| Vortex Drilling, Inc. | 10 | 15 | — | 2009–2013 |
| MARAL DRILLING | 7 | 400 | 30 | 2015–2023 |
| Mike-N-Sons All-Terrain Well & Pump Service | 6 | 300 | 38 | 2023–2025 |
| WALKER HILL ENVIRONMENTAL INC | 6 | 130 | — | 2018–2019 |
| Jones Environmental Drilling, Inc. | 3 | 110 | — | 2011 |
| J.E.D.I. Drilling Contractors,Inc. | 3 | 110 | — | 2006 |
| JEDI Drilling Contactors,Inc | 2 | 109 | — | 2006–2009 |
| Alamo1 Drilling | 1 | 130 | — | 2025 |
| Jose L Alvarado Drilling | 1 | 160 | 20 | 2026 |
| Cascade Drilling | 1 | 42 | — | 2014 |
| BELL WATERWELL SERVICE | 1 | 494 | 30 | 2011 |
| Pursley Drilling Ltd. | 1 | 440 | 50 | 2004 |
| PAGE WATER WELL | 1 | 500 | 100 | 2003 |
What the wells are for
| 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 |
| 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
| 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.
This grid falls in Starr County, Hidalgo County.