# Well grid 65-40, Texas — Galveston, Harris — how deep, and through what

> 1,202 well reports in Texas state well grid 65-40, covering Galveston, Harris, Wharton. Median depth 395 ft.

## Texas well grid 65-40

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Galveston County](/county/galveston.md) and [Harris County](/county/harris.md). **1,202** reports, median depth **395 ft**.

### What you will drill through in grid 65-40

*Logged in state well grid 65-40, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 668 , **Sand** 200 , **Soil** 126 , **Top Soil** 110 , **Topsoil** 86 , **Silty Clay** 19 |
| 25–50 ft | **Clay** 255 , **Sand** 151 , **Clay & Shale** 12 , **Clay Tan** 9 , **Clay-Red** 8 , **Red Clay** 7 |
| 50–100 ft | **Sand** 478 , **Clay** 136 , **Clay & Shale** 20 , **Sand Tan** 14 , **Sand .005** 12 , **Clay And Shale** 11 |
| 100–200 ft | **Clay** 400 , **Sand** 356 , **Clay & Shale** 54 , **Clay And Shale** 51 , **Red Clay** 16 , **Clay-Gray** 16 |
| 200–300 ft | **Clay** 73 , **Sand** 61 , **Clay & Shale** 8 , **Clay And Shale** 7 , **Gray Clay** 4 , **Clay Grey** 3 |
| 300–500 ft | **Sand** 364 , **Clay** 132 , **Clay & Shale** 25 , **Shell** 22 , **Clay And Shale** 13 , **Sand .006** 13 |
| 500–1000 ft | **Sand** 114 , **Clay** 31 , **Sand .006** 9 , **Sand-Tan-Fine Sand-Tan-.006-.008** 4 , **Sand-Gray-.006-.008** 4 , **Clay And Shale** 4 |

### Who drills here

*Licensed firms in state well grid 65-40, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Environmental Service](/driller/environmental-service.md) | 346 | 436 | 65 | 2000–2026 |
| [O'Day Drilling Company, Inc.](/driller/o-day-drilling-company-inc.md) | 102 | 465 | 60 | 2003–2026 |
| [GWR Windmills & Water Well Services, LLC](/driller/gwr-windmills-water-well-services-llc.md) | 92 | 416 | 60 | 2019–2026 |
| [BEST DRILLING SERVICES, INC.](/driller/best-drilling-services-inc.md) | 83 | 27 | — | 2004–2024 |
| [Almeda Water Well Service](/driller/almeda-water-well-service.md) | 79 | 480 | 75 | 2003–2025 |
| [Davison Water Well Service](/driller/davison-water-well-service.md) | 71 | 404 | 30 | 2004–2024 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 58 | 25 | — | 2013–2025 |
| [Mathers Environmental Drilling Inc.](/driller/mathers-environmental-drilling-inc.md) | 41 | 20 | — | 2003–2024 |
| [MEZA WATER WELL SERVICE](/driller/meza-water-well-service.md) | 35 | 420 | 60 | 2015–2025 |
| [Keenan Water Well](/driller/keenan-water-well.md) | 32 | 408 | 30 | 2003–2007 |
| [Alpine Field Services](/driller/alpine-field-services.md) | 20 | 25 | — | 2004–2014 |
| [Keenan Water Well & Septic Systems](/driller/keenan-water-well-septic-systems.md) | 18 | 416 | 40 | 2005–2011 |
| [Alliance Maintenance and Services](/driller/alliance-maintenance-and-services.md) | 16 | 3 | — | 2012 |
| [H/ET](/driller/h-et.md) | 13 | 26 | — | 2016 |
| [WDC Exploration & Wells](/driller/wdc-exploration-wells.md) | 13 | 178 | — | 2010–2011 |
| Enviromental Service | 12 | 442 | 65 | 2002–2014 |
| [Advanced Drilling Systems, Inc.](/driller/advanced-drilling-systems-inc.md) | 9 | 25 | — | 2005–2025 |
| [Hydrogeologic/Environmental Testing](/driller/hydrogeologic-environmental-testing.md) | 9 | 101 | — | 2009 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 9 | 20 | — | 2008–2009 |
| [City Survey](/driller/city-survey.md) | 8 | 25 | — | 2013–2022 |
| [Strata Core Services, LLC](/driller/strata-core-services-llc.md) | 8 | 30 | — | 2017 |
| [Hydrex Environmental, Inc.](/driller/hydrex-environmental-inc.md) | 8 | — | — | 2005 |
| [Soiltech Services Inc.](/driller/soiltech-services-inc.md) | 6 | 25 | — | 2023–2024 |
| [A-1 Water Well Drilling service](/driller/a-1-water-well-drilling-service.md) | 6 | 420 | 75 | 2004–2019 |
| Keenan Water Well & Septic | 6 | 446 | 40 | 2013–2017 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 827 | 68.8% | 435 |
| Monitor | 228 | 19.0% | 25 |
| Environmental Soil Boring | 84 | 7.0% | 10 |
| Other | 18 | 1.5% | 25 |
| Test Well | 13 | 1.1% | 20 |
| Public Supply | 12 | 1.0% | 668 |
| Industrial | 8 | 0.7% | 580 |
| Irrigation | 5 | 0.4% | 465 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 457 | 405 | 88 |
| 2010s | 449 | 404 | 91 |
| 2020s | 296 | 125 | 70 |

### The deepest reports on file

*Deepest reports in state well grid 65-40. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 89462 | 2006 | 3,703 | 86 | 85 | Domestic |
| 268912 | 2011 | 1,024 | 88 | 76 | Test Well |
| 427654 | 2016 | 925 | 106 | 410 | Public Supply |
| 387108 | 2015 | 800 | 123 | 1,511 | Public Supply |
| 268920 | 2011 | 780 | 93 | 900 | Public Supply |
| 190754 | 2006 | 780 | 70 | — | Domestic |
| 171697 | 2008 | 773 | 85 | 20 | Domestic |
| 567372 | 2021 | 760 | 90 | 35 | Domestic |
| 564359 | 2021 | 760 | 90 | 35 | Domestic |
| 163076 | 2007 | 760 | 71 | — | Domestic |

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 65-40?

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 [Galveston County](/county/galveston.md), [Harris County](/county/harris.md), [Wharton County](/county/wharton.md), [Brazoria County](/county/brazoria.md).

### Grids with a comparable number of reports

- [32-04](/area/32-04.md)
- [65-37](/area/65-37.md)
- [34-46](/area/34-46.md)
- [24-32](/area/24-32.md)
- [27-20](/area/27-20.md)
- [68-13](/area/68-13.md)
- [65-08](/area/65-08.md)
- [27-11](/area/27-11.md)
- [28-45](/area/28-45.md)
- [68-45](/area/68-45.md)
- [57-21](/area/57-21.md)
- [60-53](/area/60-53.md)
- [32-02](/area/32-02.md)

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Página: https://texas-water-wells.pages.dev/area/65-40/
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