# Well grid 66-40, Texas — Wharton, Fort Bend — how deep, and through what

> 377 well reports in Texas state well grid 66-40, covering Wharton, Fort Bend. Median depth 205 ft.

## Texas well grid 66-40

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Wharton County](/county/wharton.md) and [Fort Bend County](/county/fort-bend.md). **377** reports, median depth **205 ft**.

### What you will drill through in grid 66-40

*Logged in state well grid 66-40, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 166 , **Top Soil** 116 , **Sand** 94 , **Red Clay** 83 , **Topsoil** 59 , **Black Topsoil** 15 |
| 25–50 ft | **Sand** 99 , **Clay** 61 , **Red Clay** 19 , **Sandy Clay** 13 , **Fine Sand** 10 , **Brown Clay** 6 |
| 50–100 ft | **Sand** 139 , **Clay** 109 , **Red Clay** 45 , **Sand & Clay** 13 , **Fine Sand** 11 , **Coarse Sand** 10 |
| 100–200 ft | **Sand** 211 , **Clay** 129 , **Red Clay** 34 , **Coarse Sand** 17 , **Gray Clay** 9 , **Sand & Clay** 12 |
| 200–300 ft | **Sand** 66 , **Clay** 33 , **Red Clay** 9 , **Sand & Clay** 7 , **Coarse Sand** 4 , **Gray Clay** 5 |
| 300–500 ft | **Sand** 11 , **Clay** 9 , **Tan Clay** 2 , **Sandstone** 2 , **Soft Clay** 1 , **White Clay** 1 |
| 500–1000 ft | **Clay** 3 , **Sand Mix** 1 , **Sand** 1 , **Sand & Clay** 1 |

### Who drills here

*Licensed firms in state well grid 66-40, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Ondrey Water Well Service](/driller/ondrey-water-well-service.md) | 72 | 205 | — | 2004–2026 |
| [G.W.Davis Water Well Co LLC](/driller/g-w-davis-water-well-co-llc.md) | 35 | 224 | 60 | 2014–2026 |
| [1st Choice Water Wells](/driller/1st-choice-water-wells.md) | 28 | 220 | 50 | 2013–2021 |
| [Chaffin Water Well Service](/driller/chaffin-water-well-service.md) | 16 | 200 | 70 | 2007–2023 |
| [Dirba Water Wells](/driller/dirba-water-wells.md) | 15 | 202 | — | 2000–2008 |
| [Kight Water Well Service](/driller/kight-water-well-service.md) | 11 | 203 | 55 | 2021–2026 |
| [Mesecke Water Well](/driller/mesecke-water-well.md) | 11 | 220 | 18 | 2005–2019 |
| [J&S WATER WELLS](/driller/j-s-water-wells.md) | 10 | 530 | 2,500 | 2007–2022 |
| [Burleson Services, Inc.](/driller/burleson-services-inc.md) | 10 | 180 | 100 | 2004–2009 |
| [Goolsby Water Well Service LLC](/driller/goolsby-water-well-service-llc.md) | 9 | 230 | 60 | 2015–2025 |
| [Chaffin Water Wells](/driller/chaffin-water-wells.md) | 8 | 300 | 55 | 2015–2020 |
| [Soltek LLC](/driller/soltek-llc.md) | 8 | 35 | — | 2018 |
| [Joe Ferguson Drilling, Inc.](/driller/joe-ferguson-drilling-inc.md) | 8 | 180 | — | 2003–2005 |
| Spradley Water Well | 7 | 200 | — | 2004–2007 |
| Bain Drilling | 7 | 110 | 80 | 2004 |
| [Advanced Drilling Systems, Inc.](/driller/advanced-drilling-systems-inc.md) | 6 | 45 | — | 2018–2022 |
| [RONNIE GOOLSBY WATER WELL SERVICE](/driller/ronnie-goolsby-water-well-service.md) | 6 | 230 | 100 | 2005–2013 |
| [Mathers Environmental Drilling Inc.](/driller/mathers-environmental-drilling-inc.md) | 6 | 45 | — | 2010–2011 |
| [C & S UTESEY WATER WELL SERVICE & DRILLING, L.L.C.](/driller/c-s-utesey-water-well-service-drilling-l-l-c.md) | 6 | 220 | 80 | 2003–2010 |
| [Texas Southern Drilling](/driller/texas-southern-drilling.md) | 5 | 225 | 40 | 2021–2026 |
| [Everett Carroll Water Well Service](/driller/everett-carroll-water-well-service.md) | 5 | 200 | 75 | 2003–2005 |
| [Neuendorff's Water Well Service, Inc.](/driller/neuendorff-s-water-well-service-inc.md) | 4 | 215 | 80 | 2024–2026 |
| [GMG Water Well Drilling, LLC](/driller/gmg-water-well-drilling-llc.md) | 4 | 160 | — | 2024–2026 |
| [Ricky Bonds Water Wells](/driller/ricky-bonds-water-wells.md) | 4 | 220 | 100 | 2016–2023 |
| [Hatton Water Well Service](/driller/hatton-water-well-service.md) | 4 | 162 | 50 | 2021–2022 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 269 | 71.4% | 208 |
| Stock | 26 | 6.9% | 203 |
| Rig Supply | 26 | 6.9% | 200 |
| Monitor | 20 | 5.3% | 45 |
| Industrial | 16 | 4.2% | 200 |
| Irrigation | 15 | 4.0% | 305 |
| Public Supply | 4 | 1.1% | 315 |
| Other | 1 | 0.3% | 190 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 109 | 200 | 40 |
| 2010s | 145 | 211 | 50 |
| 2020s | 123 | 203 | 50 |

### The deepest reports on file

*Deepest reports in state well grid 66-40. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 283829 | 2012 | 660 | 42 | 2,500 | Irrigation |
| 539974 | 2020 | 600 | 45 | 2,500 | Irrigation |
| 539979 | 2020 | 552 | — | 2,500 | Irrigation |
| 606728 | 2022 | 530 | 40 | 2,500 | Irrigation |
| 606688 | 2022 | 530 | 40 | 2,500 | Irrigation |
| 529802 | 2019 | 405 | 58 | — | Domestic |
| 521869 | 2019 | 396 | 73 | 800 | Public Supply |
| 212372 | 2005 | 385 | 40 | — | Domestic |
| 449265 | 2017 | 375 | 49 | — | Domestic |
| 537376 | 2020 | 370 | 45 | 2,500 | 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 66-40?

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 [Wharton County](/county/wharton.md), [Fort Bend County](/county/fort-bend.md).

### Grids with a comparable number of reports

- [66-06](/area/66-06.md)
- [34-33](/area/34-33.md)
- [66-20](/area/66-20.md)
- [02-61](/area/02-61.md)
- [81-04](/area/81-04.md)
- [35-37](/area/35-37.md)
- [65-62](/area/65-62.md)
- [79-03](/area/79-03.md)
- [18-51](/area/18-51.md)
- [79-58](/area/79-58.md)
- [79-46](/area/79-46.md)
- [27-56](/area/27-56.md)
- [28-27](/area/28-27.md)

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Página: https://texas-water-wells.pages.dev/area/66-40/
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