# Well grid 65-21, Texas — Harris, Liberty — how deep, and through what

> 3,053 well reports in Texas state well grid 65-21, covering Harris, Liberty, Houston. Median depth 30 ft.

## Texas well grid 65-21

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Harris County](/county/harris.md) and [Liberty County](/county/liberty.md). **3,053** reports, median depth **30 ft**.

### What you will drill through in grid 65-21

*Logged in state well grid 65-21, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Concrete** 366 , **Clay** 197 , **Asphalt** 220 , **No Recovery** 111 , **Silty Clay, Gray** 113 , **Sand** 89 |
| 25–50 ft | **Clay** 88 , **Sand** 98 , **No Recovery** 62 , **Sandy Clay, Lt. Gray** 39 , **Clay, Reddish Brown** 35 , **Sand, Lt. Gray** 38 |
| 50–100 ft | **Clay, Reddish Brown** 26 , **Clay** 21 , **Sand** 18 , **Clay, Red** 23 , **Red Clay** 10 , **No Recovery** 4 |
| 100–200 ft | **Clay** 16 , **Sand** 17 , **Red Clay** 6 , **Sand-Tan-.006-.008** 5 , **Clay-Red** 3 , **.006-.008 Tan Sand** 2 |
| 200–300 ft | **Sand** 22 , **Clay** 20 , **Red Clay** 7 , **Clay-Red** 4 , **Tan Sand (.006-.008)** 3 , **Sand-Tan-.006-.008 Sand-Tan-.010-.012** 3 |
| 300–500 ft | **Sand** 19 , **Clay** 13 , **Sand-White-.006-.008** 5 , **Red Clay** 3 , **Clay-Red Clay-Blue** 3 , **Clay-Red** 3 |
| 500–1000 ft | **Clay** 3 , **Sand** 3 , **Clay,Sand** 1 , **Sand,Clay** 1 , **Fine Sand** 1 , **Clay-Red** 1 |
| 1000–5000 ft | **Sand,Clay** 1 , **Sand** 1 , **Clay,Sand** 1 , **Clay** 2 , **Sand,Clay,Gravel** 1 , **Gravel,Clay** 1 |

### Who drills here

*Licensed firms in state well grid 65-21, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [BEST DRILLING SERVICES, INC.](/driller/best-drilling-services-inc.md) | 992 | 30 | — | 2002–2026 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 493 | 25 | — | 2001–2026 |
| [Mathers Environmental Drilling Inc.](/driller/mathers-environmental-drilling-inc.md) | 385 | 30 | — | 2002–2026 |
| [Alpine Field Services](/driller/alpine-field-services.md) | 231 | 25 | — | 2004–2016 |
| [Advanced Drilling Systems, Inc.](/driller/advanced-drilling-systems-inc.md) | 137 | 30 | — | 2001–2026 |
| [WOMBLE DRILLING CO. INC.](/driller/womble-drilling-co-inc.md) | 59 | 44 | 50 | 2005–2010 |
| [MagnaCore Drilling & Environmental Services](/driller/magnacore-drilling-environmental-services.md) | 56 | 30 | — | 2005–2011 |
| [Soltek LLC](/driller/soltek-llc.md) | 49 | 30 | — | 2015–2023 |
| [Van and Sons Drilling Service](/driller/van-and-sons-drilling-service.md) | 39 | 40 | — | 2014–2025 |
| Allaince Maintenance & Services, Inc. | 36 | — | — | 2013 |
| [Vironex Inc.](/driller/vironex-inc.md) | 36 | 39 | — | 2010 |
| [Geothermal Drilling inc](/driller/geothermal-drilling-inc.md) | 33 | 300 | — | 2003–2017 |
| [Gainco, Inc.](/driller/gainco-inc.md) | 31 | 33 | — | 2009–2013 |
| [Master Monitoring Services, Inc.](/driller/master-monitoring-services-inc.md) | 29 | 25 | — | 2005–2007 |
| [Gearen Drilling](/driller/gearen-drilling.md) | 28 | 20 | 0 | 2011–2016 |
| [ESN-South](/driller/esn-south.md) | 27 | 35 | — | 2003–2009 |
| [dba Universal Drilling Services](/driller/dba-universal-drilling-services.md) | 26 | 25 | — | 2002–2005 |
| [Alliance Maintenance & Services, Inc.](/driller/alliance-maintenance-services-inc.md) | 25 | — | — | 2014 |
| [City Survey](/driller/city-survey.md) | 23 | 30 | — | 2012–2021 |
| [Tolunay-Wong Engineers,Inc](/driller/tolunay-wong-engineers-inc.md) | 23 | 35 | — | 2015–2019 |
| [Wel-Mat Drilling LLP](/driller/wel-mat-drilling-llp.md) | 22 | — | — | 2006–2015 |
| [Petra Environmental](/driller/petra-environmental.md) | 20 | 22 | — | 2002–2005 |
| [Almeda Water Well Service](/driller/almeda-water-well-service.md) | 17 | 431 | 120 | 2003–2023 |
| [Universal Drilling Services of Texas, LLC](/driller/universal-drilling-services-of-texas-llc.md) | 17 | — | — | 2007–2009 |
| [O'Day Drilling Company, Inc.](/driller/o-day-drilling-company-inc.md) | 12 | 412 | 60 | 2004–2024 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Monitor | 2,119 | 69.4% | 30 |
| Environmental Soil Boring | 451 | 14.8% | 18 |
| Injection | 182 | 6.0% | 26 |
| Test Well | 122 | 4.0% | 30 |
| De-watering | 63 | 2.1% | 44 |
| Closed-Loop Geothermal | 38 | 1.2% | 300 |
| Other | 31 | 1.0% | 25 |
| Irrigation | 17 | 0.6% | 420 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1980s | 1 | 200 | — |
| 1990s | 1 | 250 | — |
| 2000s | 1,112 | 30 | 15 |
| 2010s | 1,363 | 31 | 18 |
| 2020s | 576 | 26 | 20 |

### The deepest reports on file

*Deepest reports in state well grid 65-21. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 202419 | 2009 | 1,600 | 236 | 2,023 | Industrial |
| 671053 | 2024 | 626 | 230 | 400 | Industrial |
| 222666 | 2010 | 564 | 190 | — | Industrial |
| 204282 | 2008 | 541 | 187 | 550 | Domestic |
| 145996 | 2008 | 515 | 195 | 100 | Domestic |
| 112824 | 2007 | 510 | 195 | 90 | Domestic |
| 521330 | 2019 | 458 | 194 | 120 | Irrigation |
| 51217 | 2004 | 456 | 190 | 70 | Irrigation |
| 633992 | 2023 | 440 | 180 | 80 | Irrigation |
| 633991 | 2023 | 440 | 185 | 100 | 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 65-21?

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 [Harris County](/county/harris.md), [Liberty County](/county/liberty.md), [Houston County](/county/houston.md), [Montgomery County](/county/montgomery.md), [Caldwell County](/county/caldwell.md).

### Grids with a comparable number of reports

- [68-37](/area/68-37.md)
- [68-36](/area/68-36.md)
- [32-14](/area/32-14.md)
- [58-43](/area/58-43.md)
- [65-13](/area/65-13.md)
- [65-14](/area/65-14.md)
- [06-57](/area/06-57.md)
- [45-08](/area/45-08.md)
- [33-09](/area/33-09.md)
- [27-19](/area/27-19.md)
- [23-33](/area/23-33.md)
- [27-64](/area/27-64.md)
- [65-22](/area/65-22.md)

---

Página: https://texas-water-wells.pages.dev/area/65-21/
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