# Well grid 66-07, Texas — Austin, Waller — how deep, and through what

> 287 well reports in Texas state well grid 66-07, covering Austin, Waller, Grimes. Median depth 205 ft.

## Texas well grid 66-07

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Austin County](/county/austin.md) and [Waller County](/county/waller.md). **287** reports, median depth **205 ft**.

### What you will drill through in grid 66-07

*Logged in state well grid 66-07, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 92 , **Sand** 49 , **Top Soil** 30 , **Topsoil** 25 , **Shale** 24 , **Sandy Top Soil** 19 |
| 25–50 ft | **Sand** 45 , **Clay** 17 , **White Clay** 9 , **Sand/Rock** 6 , **Sand & Gravel** 5 , **White Sand** 5 |
| 50–100 ft | **Sand** 50 , **Clay** 41 , **Clay/Rock** 11 , **Shale** 10 , **Sand & Sandrock Layers** 8 , **Clay & Sandrock Layers** 8 |
| 100–200 ft | **Sand** 81 , **Clay** 48 , **Shale** 21 , **Rock** 18 , **Tan Clay** 9 , **Sand & Rock Layers** 11 |
| 200–300 ft | **Sand** 35 , **Clay** 30 , **Shale** 9 , **Rock** 6 , **Sand & Rock** 5 , **Fine Brown Sand And Rock** 2 |
| 300–500 ft | **Clay** 14 , **Sand** 13 , **Sand And Rock** 2 , **Shale** 2 , **Clay & Shale** 2 , **Shale & Clay** 1 |
| 500–1000 ft | **Sand** 3 , **Clay** 4 , **Shale** 2 , **Clay Mixed With Sand** 1 , **Shale & Clay** 1 , **Clay & Rock** 1 |

### Who drills here

*Licensed firms in state well grid 66-07, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [A.W. Flentge Service](/driller/a-w-flentge-service.md) | 42 | 202 | 50 | 2003–2022 |
| [J&S WATER WELLS](/driller/j-s-water-wells.md) | 27 | 430 | 80 | 2005–2024 |
| [WASHINGTON CO WATER WELL DRILLING](/driller/washington-co-water-well-drilling.md) | 24 | 175 | 30 | 2014–2026 |
| [AQUA STAR LLC](/driller/aqua-star-llc.md) | 22 | 240 | 50 | 2012–2023 |
| [Leon Flentge Water Well Drilling and Service](/driller/leon-flentge-water-well-drilling-and-service.md) | 22 | 210 | 60 | 2004–2012 |
| [HEFLIN WATER WORKS](/driller/heflin-water-works.md) | 19 | 230 | 40 | 2005–2023 |
| [BEST DRILLING SERVICES, INC.](/driller/best-drilling-services-inc.md) | 15 | 45 | — | 2010–2022 |
| [Leon Flentge Water Well Drilling](/driller/leon-flentge-water-well-drilling.md) | 11 | 228 | 60 | 2014–2020 |
| [Texas Southern Drilling](/driller/texas-southern-drilling.md) | 8 | 225 | 50 | 2021–2025 |
| [TIM FRANKS WATER WELL SERVICE](/driller/tim-franks-water-well-service.md) | 8 | 245 | 40 | 2024–2025 |
| [Neuendorff's Water Well Service, Inc.](/driller/neuendorff-s-water-well-service-inc.md) | 7 | 240 | 60 | 2015–2025 |
| [Ricky Bonds Water Wells](/driller/ricky-bonds-water-wells.md) | 7 | 200 | 40 | 2013–2023 |
| [Geophysical Drilling, Inc.](/driller/geophysical-drilling-inc.md) | 7 | 239 | 60 | 2008–2020 |
| [Main Stream Environmental](/driller/main-stream-environmental.md) | 6 | 240 | 40 | 2021–2026 |
| [Cobra Water Well Drilling, LLC.](/driller/cobra-water-well-drilling-llc.md) | 6 | 220 | 25 | 2011–2025 |
| [WEST Drilling](/driller/west-drilling.md) | 5 | 25 | — | 2018 |
| Flentge Water Well Drilling & Service | 5 | 186 | 100 | 2003–2004 |
| [Bluebonnet Water Wells](/driller/bluebonnet-water-wells.md) | 3 | 190 | 50 | 2026 |
| [J & S Water Wells - Primo Trejo](/driller/j-s-water-wells-primo-trejo.md) | 3 | — | 100 | 2010–2013 |
| [Terra Power Drilling LLC](/driller/terra-power-drilling-llc.md) | 3 | 170 | 80 | 2010–2011 |
| [Neuendorff's Water Well Svc., Inc.](/driller/neuendorff-s-water-well-svc-inc.md) | 3 | 182 | 30 | 2003–2011 |
| Flentge Water Well Drilling & Serv. | 3 | 240 | 70 | 2003–2005 |
| [Flentge Water Well Drilling and Service](/driller/flentge-water-well-drilling-and-service.md) | 3 | 129 | 35 | 2005–2006 |
| [ONE STOP SEPTICS & WATER WELLS](/driller/one-stop-septics-water-wells.md) | 2 | 205 | 35 | 2026 |
| [MARAL DRILLING](/driller/maral-drilling.md) | 2 | 180 | 30 | 2017–2019 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 221 | 77.0% | 215 |
| Industrial | 17 | 5.9% | 430 |
| Irrigation | 13 | 4.5% | 245 |
| Monitor | 13 | 4.5% | 50 |
| Stock | 11 | 3.8% | 180 |
| Environmental Soil Boring | 8 | 2.8% | 35 |
| Test Well | 1 | 0.3% | 20 |
| Public Supply | 1 | 0.3% | 730 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 92 | 210 | 53 |
| 2010s | 111 | 220 | 60 |
| 2020s | 84 | 200 | 54 |

### The deepest reports on file

*Deepest reports in state well grid 66-07. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 536692 | 2020 | 730 | 166 | 210 | Public Supply |
| 666724 | 2024 | 610 | 120 | 150 | Irrigation |
| 383457 | 2014 | 590 | 140 | 100 | Industrial |
| 430632 | 2016 | 550 | 162 | 20 | Domestic |
| 226949 | 2009 | 550 | 140 | 180 | Industrial |
| 728127 | 2026 | 540 | 168 | 50 | Domestic |
| 138994 | 2007 | 520 | 130 | 45 | Domestic |
| 641048 | 2023 | 510 | 158 | 40 | Domestic |
| 364191 | 2014 | 470 | 70 | 200 | Industrial |
| 164267 | 2008 | 470 | 150 | 30 | 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 66-07?

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 [Austin County](/county/austin.md), [Waller County](/county/waller.md), [Grimes County](/county/grimes.md), [Lee County](/county/lee.md).

### Grids with a comparable number of reports

- [18-60](/area/18-60.md)
- [21-41](/area/21-41.md)
- [83-05](/area/83-05.md)
- [56-54](/area/56-54.md)
- [02-52](/area/02-52.md)
- [32-36](/area/32-36.md)
- [35-58](/area/35-58.md)
- [02-60](/area/02-60.md)
- [27-05](/area/27-05.md)
- [32-39](/area/32-39.md)
- [67-08](/area/67-08.md)
- [79-12](/area/79-12.md)
- [83-08](/area/83-08.md)

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Página: https://texas-water-wells.pages.dev/area/66-07/
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