# Well grid 18-50, Texas — Collin, Denton — how deep, and through what

> 752 well reports in Texas state well grid 18-50, covering Collin, Denton, Dallas. Median depth 20 ft.

## Texas well grid 18-50

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Collin County](/county/collin.md) and [Denton County](/county/denton.md). **752** reports, median depth **20 ft**.

### What you will drill through in grid 18-50

*Logged in state well grid 18-50, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 75 , **Gray Shale** 75 , **Brown Clay** 44 , **Yellow Clay** 44 , **Clay** 34 , **Tan Clay** 32 |
| 25–50 ft | **Gray Shale** 25 , **Dark Gray Shale** 6 , **Shale - Gray** 4 , **Grey Shale** 3 , **Shale** 2 , **Grey Weathered Shale** 1 |
| 50–100 ft | **Gray Shale** 23 , **Grey Shale** 2 , **Crm/Gray Chalk** 2 , **Lime & Grey Clay** 1 , **Gray Clay** 1 , **Lime Layers** 1 |
| 100–200 ft | **Gray Shale** 24 , **Blue Clay** 1 , **Shale W/Sand Streaks** 1 , **Hard Limestone** 1 , **Sand Sandy Grey Clay** 1 , **Gray Shale/Sand** 1 |
| 200–300 ft | **Gray Shale** 9 , **Sand** 5 , **Sandy Gray Shale** 3 , **(Sand)** 2 , **Shale** 2 , **Lime, Shale** 1 |
| 300–500 ft | **Sand** 28 , **Gray Shale** 20 , **Shale** 6 , **Sand/Gray Shale** 4 , **Gray Shale/Sand** 3 , **Sandy Gray Shale** 4 |
| 500–1000 ft | **Sand** 89 , **Gray Shale** 45 , **Shale** 35 , **Sandy Shale** 12 , **Broken Sand** 11 , **Sand And Shale** 7 |
| 1000–5000 ft | **Sand** 16 , **Shale** 11 , **Limestone** 7 , **Broken Sand** 5 , **Gray Shale** 4 , **Sandy Gray Shale** 1 |

### Who drills here

*Licensed firms in state well grid 18-50, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Sunbelt Industrial Services](/driller/sunbelt-industrial-services.md) | 94 | 8 | — | 2007–2026 |
| [Earth Tech](/driller/earth-tech.md) | 73 | 700 | 25 | 2004–2020 |
| [WEST Drilling](/driller/west-drilling.md) | 71 | 15 | — | 2016–2023 |
| [RIOMAR ENVIRONMENTAL DRILLING](/driller/riomar-environmental-drilling.md) | 66 | 5 | — | 2011 |
| [Environmental Logistics Company, LLC](/driller/environmental-logistics-company-llc.md) | 48 | 15 | — | 2016–2026 |
| [Strata Core Services, LLC](/driller/strata-core-services-llc.md) | 46 | 20 | — | 2011–2016 |
| [W.E.S.T. Drilling](/driller/w-e-s-t-drilling.md) | 34 | 20 | — | 2006–2015 |
| [MagnaCore Drilling & Environmental Services](/driller/magnacore-drilling-environmental-services.md) | 20 | 9 | — | 2005–2016 |
| [SCI](/driller/sci.md) | 20 | 20 | — | 2005–2013 |
| [Johnson Drilling, Inc.](/driller/johnson-drilling-inc.md) | 19 | 250 | 75 | 2002–2022 |
| [Savage Excavation](/driller/savage-excavation.md) | 17 | 19 | — | 2024–2025 |
| [Total Support Services](/driller/total-support-services.md) | 15 | 6 | — | 2005–2014 |
| [Pacific West Environmental and Infrastructure](/driller/pacific-west-environmental-and-infrastructure.md) | 13 | 21 | — | 2025–2026 |
| [Barco Well Service, LP](/driller/barco-well-service-lp.md) | 13 | 770 | 170 | 2015–2024 |
| [Roddy Qualls Environmental Drilling](/driller/roddy-qualls-environmental-drilling.md) | 13 | 25 | — | 2014–2019 |
| [Double D Drilling](/driller/double-d-drilling.md) | 12 | 680 | 23 | 2011–2026 |
| [Subterra Environmental Services, LLC.](/driller/subterra-environmental-services-llc.md) | 12 | 15 | — | 2018–2022 |
| [Texplor of Dallas, Inc.](/driller/texplor-of-dallas-inc.md) | 12 | 20 | — | 2022 |
| [A.L. Moser Drilling, Inc.](/driller/a-l-moser-drilling-inc.md) | 12 | 985 | 10 | 2004–2013 |
| [ETTL Engineers & Consultants Inc.](/driller/ettl-engineers-consultants-inc.md) | 12 | 15 | — | 2011 |
| Geoscience Consultants Intl., LLC | 8 | 40 | — | 2018 |
| [Wel-Mat Drilling LLP](/driller/wel-mat-drilling-llp.md) | 7 | — | — | 2006–2012 |
| [Strata Core Drilling Co.](/driller/strata-core-drilling-co.md) | 7 | 25 | — | 2010–2011 |
| [THI WATER WELL](/driller/thi-water-well.md) | 6 | 1,010 | 240 | 2018–2026 |
| [Groundwater Monitoring Inc.](/driller/groundwater-monitoring-inc.md) | 6 | 4 | — | 2006 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Environmental Soil Boring | 268 | 35.6% | 8 |
| Monitor | 264 | 35.1% | 20 |
| Irrigation | 90 | 12.0% | 940 |
| Closed-Loop Geothermal | 56 | 7.4% | 250 |
| Stock | 23 | 3.1% | 980 |
| Other | 23 | 3.1% | 20 |
| Domestic | 14 | 1.9% | 650 |
| Test Well | 8 | 1.1% | 31 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 154 | 250 | 470 |
| 2010s | 432 | 15 | 500 |
| 2020s | 166 | 20 | 15 |

### The deepest reports on file

*Deepest reports in state well grid 18-50. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 683251 | 2023 | 2,620 | — | — | Irrigation |
| 146670 | 2007 | 2,241 | — | — | Injection |
| 232038 | 2003 | 2,169 | — | 650 | Public Supply |
| 297459 | 2012 | 1,900 | 890 | 200 | Stock |
| 502299 | 2018 | 1,760 | 927 | — | Irrigation |
| 297446 | 2012 | 1,716 | 850 | 200 | Stock |
| 296439 | 2012 | 1,716 | 850 | 210 | Irrigation |
| 297453 | 2012 | 1,656 | 803 | 200 | Stock |
| 296442 | 2012 | 1,656 | 803 | 210 | Irrigation |
| 461073 | 2016 | 1,600 | 800 | 20 | Irrigation |

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 18-50?

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 [Collin County](/county/collin.md), [Denton County](/county/denton.md), [Dallas County](/county/dallas.md), [Grayson County](/county/grayson.md), [Hunt County](/county/hunt.md).

### Grids with a comparable number of reports

- [19-51](/area/19-51.md)
- [65-53](/area/65-53.md)
- [83-21](/area/83-21.md)
- [20-04](/area/20-04.md)
- [68-19](/area/68-19.md)
- [37-43](/area/37-43.md)
- [18-57](/area/18-57.md)
- [57-42](/area/57-42.md)
- [28-43](/area/28-43.md)
- [83-25](/area/83-25.md)
- [35-35](/area/35-35.md)
- [32-26](/area/32-26.md)
- [58-50](/area/58-50.md)

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Página: https://texas-water-wells.pages.dev/area/18-50/
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