# Well grid 68-21, Texas — Bexar, Comal — how deep, and through what

> 514 well reports in Texas state well grid 68-21, covering Bexar, Comal, Blanco. Median depth 620 ft.

## Texas well grid 68-21

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Bexar County](/county/bexar.md) and [Comal County](/county/comal.md). **514** reports, median depth **620 ft**.

### What you will drill through in grid 68-21

*Logged in state well grid 68-21, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 53 , **Caliche** 43 , **Tan Limestone** 34 , **Top Soil** 31 , **Cream Limestone** 22 , **Tan Lime** 21 |
| 25–50 ft | **Grey Rock** 4 , **Gray Lime** 4 , **Grey Limestone** 5 , **Tan Lime** 5 , **Gray L/S** 4 , **Grey Rock & Clay** 4 |
| 50–100 ft | **Grey Limestone** 11 , **Gray Limestone** 8 , **Tan Limestone** 10 , **Tan Rock** 7 , **No Returns** 5 , **Grey Rock** 5 |
| 100–200 ft | **Gray Limestone** 13 , **Tan Limestone** 13 , **Grey Limestone** 12 , **Tan Lime** 9 , **Grey Rock** 8 , **Gray Clay** 6 |
| 200–300 ft | **Tan Limestone** 17 , **Grey Limestone** 14 , **Tan Lime** 11 , **Gray Limestone** 9 , **Gray/Tan Limestone** 10 , **Lt.Gray Lime** 10 |
| 300–500 ft | **Tan Limestone** 20 , **Gray Limestone** 20 , **Lt.Gray Lime** 13 , **Tan Lime** 15 , **Grey Limestone** 14 , **Gray Lime** 12 |
| 500–1000 ft | **Td** 32 , **Gray Limestone** 16 , **Bexar Shale** 19 , **Cow Creek** 16 , **Tan Limestone** 11 , **Tan Rock** 12 |
| 1000–5000 ft | **Pine Island** 2 , **No Circulation-Shale & L/S** 1 , **Tan Cow Creek** 1 , **Cow Creek** 1 |

### Who drills here

*Licensed firms in state well grid 68-21, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 79 | 15 | — | 2010–2017 |
| [TR Drilling & Service LLC](/driller/tr-drilling-service-llc.md) | 65 | 780 | 20 | 2003–2026 |
| [Puddle Jumper Well Company](/driller/puddle-jumper-well-company.md) | 63 | 600 | 20 | 2003–2024 |
| [Spring Branch Water Well Service](/driller/spring-branch-water-well-service.md) | 45 | 623 | 10 | 2014–2026 |
| [BoMax Industries, Inc.](/driller/bomax-industries-inc.md) | 40 | 740 | 10 | 2002–2013 |
| [Kutscher Drilling](/driller/kutscher-drilling.md) | 26 | 700 | 15 | 2005–2023 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 16 | 15 | — | 2013–2025 |
| [Martinez Water Well](/driller/martinez-water-well.md) | 15 | 600 | 30 | 2004–2013 |
| [R.R.R. PUMP SALES & SERVICE, INC.](/driller/r-r-r-pump-sales-service-inc.md) | 14 | 920 | — | 2006–2013 |
| [Davenport Drilling & Pump Service](/driller/davenport-drilling-pump-service.md) | 13 | 880 | 50 | 2003–2020 |
| [H. W. Schwope & Sons Inc.](/driller/h-w-schwope-sons-inc.md) | 11 | 560 | 40 | 2004–2014 |
| [Alamo Environmental dba Vortex Drilling](/driller/alamo-environmental-dba-vortex-drilling.md) | 10 | 5 | — | 2023–2024 |
| [American Water Well Services Inc.](/driller/american-water-well-services-inc.md) | 7 | 820 | 40 | 2023–2026 |
| [TR Drilling and Service](/driller/tr-drilling-and-service.md) | 7 | 820 | 15 | 2003–2025 |
| [Davenport Drilling](/driller/davenport-drilling.md) | 7 | 936 | 25 | 2015–2018 |
| [Vortex Drilling Partners, LP](/driller/vortex-drilling-partners-lp.md) | 6 | 25 | — | 2020–2022 |
| [H & H Drilling](/driller/h-h-drilling.md) | 6 | 510 | 10 | 2006–2016 |
| [Armadigger, Inc.](/driller/armadigger-inc.md) | 6 | 930 | 25 | 2004–2008 |
| [Alamo1 Drilling](/driller/alamo1-drilling.md) | 5 | 50 | — | 2025–2026 |
| [Newborn Waterwell Service](/driller/newborn-waterwell-service.md) | 5 | 470 | 11 | 2002–2006 |
| [Geoprojects International, Inc.](/driller/geoprojects-international-inc.md) | 4 | 160 | — | 2002–2023 |
| Hood Drilling | 4 | 480 | 20 | 2002–2003 |
| [Zavala Drilling, CO](/driller/zavala-drilling-co.md) | 3 | 250 | — | 2012–2025 |
| [D K Drilling and Water Systems](/driller/d-k-drilling-and-water-systems.md) | 3 | 870 | 15 | 2021–2023 |
| [TERO DRILLING LLC](/driller/tero-drilling-llc.md) | 3 | 40 | — | 2021 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 354 | 68.9% | 720 |
| Environmental Soil Boring | 98 | 19.1% | 15 |
| Monitor | 29 | 5.6% | 40 |
| Public Supply | 12 | 2.3% | 870 |
| Closed-Loop Geothermal | 6 | 1.2% | 300 |
| Irrigation | 6 | 1.2% | 700 |
| Stock | 4 | 0.8% | 484 |
| Industrial | 4 | 0.8% | 500 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1990s | 1 | — | 225 |
| 2000s | 162 | 620 | 310 |
| 2010s | 242 | 580 | 343 |
| 2020s | 109 | 740 | 403 |

### The deepest reports on file

*Deepest reports in state well grid 68-21. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 156157 | 2003 | 1,140 | 265 | 500 | Public Supply |
| 175864 | 2009 | 1,120 | 587 | 25 | Domestic |
| 180597 | 2009 | 1,100 | — | — | Domestic |
| 416381 | 2015 | 1,040 | 440 | 15 | Domestic |
| 715005 | 2025 | 1,000 | 468 | — | Domestic |
| 656778 | 2023 | 1,000 | 418 | — | Domestic |
| 485102 | 2018 | 1,000 | 140 | 25 | Domestic |
| 563520 | 2020 | 980 | 356 | 50 | Domestic |
| 543922 | 2020 | 980 | 390 | 50 | Domestic |
| 28341 | 2003 | 980 | 366 | 45 | Public Supply |

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 68-21?

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 [Bexar County](/county/bexar.md), [Comal County](/county/comal.md), [Blanco County](/county/blanco.md).

### Grids with a comparable number of reports

- [66-54](/area/66-54.md)
- [28-17](/area/28-17.md)
- [45-25](/area/45-25.md)
- [68-24](/area/68-24.md)
- [66-16](/area/66-16.md)
- [68-08](/area/68-08.md)
- [31-47](/area/31-47.md)
- [79-57](/area/79-57.md)
- [31-08](/area/31-08.md)
- [57-14](/area/57-14.md)
- [68-26](/area/68-26.md)
- [80-20](/area/80-20.md)
- [35-54](/area/35-54.md)

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Página: https://texas-water-wells.pages.dev/area/68-21/
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