# Water wells in Harris County, Texas — how deep, and through what

> 40,394 well reports filed in Harris County since 2001. Median depth 35 ft, water struck at 80 ft, median yield 40 gpm.

## Water wells in Harris County, Texas

**40,394** well reports on file. The median well here was taken to **35 ft** and struck water at **80 ft** — against 180 ft and 80 ft across Texas.

### What you will drill through in Harris County

*Logged in Harris County, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 8,085 , **Sand** 3,080 , **Concrete** 3,185 , **No Recovery** 1,490 , **Top Soil** 1,483 , **Asphalt** 1,224 |
| 25–50 ft | **Sand** 3,040 , **Clay** 2,907 , **Red Clay** 442 , **No Recovery** 321 , **Clay, Red** 368 , **Rock** 289 |
| 50–100 ft | **Sand** 4,247 , **Clay** 3,525 , **Red Clay** 265 , **Rock** 249 , **Sand, Clay** 187 , **Clay, Sand** 185 |
| 100–200 ft | **Sand** 5,626 , **Clay** 5,168 , **Rock** 630 , **Clay, Sand** 308 , **Sand, Clay** 308 , **Blue Clay** 247 |
| 200–300 ft | **Sand** 5,372 , **Clay** 3,391 , **Rock** 524 , **Shale** 180 , **Sand, Clay** 200 , **Clay, Sand** 205 |
| 300–500 ft | **Sand** 2,410 , **Clay** 1,181 , **Rock** 182 , **Shale** 75 , **Clay-Red** 58 , **Sand .008** 54 |
| 500–1000 ft | **Sand** 272 , **Clay** 207 , **Clay (Gray)** 29 , **Sand/Clay** 27 , **Shale** 21 , **Clay/Sand** 21 |
| 1000–5000 ft | **Sand** 133 , **Clay** 111 , **Clay (Gray)** 20 , **Sandy Clay** 20 , **Sand/Clay** 15 , **Clay (Bluish Gray)** 7 |

The rock column here is what drillers wrote down, layer by layer, in their own words — 5,345,462 layers across 707,856 wells. It is not a geological survey: two drillers may call the same clay by two names, and this site does not correct them.

### Who drills in Harris County

*Licensed firms in Harris County, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [BEST DRILLING SERVICES, INC.](/driller/best-drilling-services-inc.md) | 8,530 | 25 | 25 | 2002–2026 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 4,417 | 25 | — | 2001–2026 |
| [Mathers Environmental Drilling Inc.](/driller/mathers-environmental-drilling-inc.md) | 3,483 | 25 | — | 2001–2026 |
| [Alpine Field Services](/driller/alpine-field-services.md) | 2,224 | 24 | — | 2003–2017 |
| [Advanced Drilling Systems, Inc.](/driller/advanced-drilling-systems-inc.md) | 1,500 | 25 | — | 2001–2026 |
| [Scott Drilling Inc.](/driller/scott-drilling-inc.md) | 1,319 | 300 | 40 | 2001–2026 |
| [Ricky Bonds Water Wells](/driller/ricky-bonds-water-wells.md) | 816 | 265 | 55 | 2003–2026 |
| [Bussell & Sons LLC](/driller/bussell-sons-llc.md) | 777 | 323 | 45 | 2002–2026 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 753 | 15 | — | 2006–2025 |
| [R&D Water Wells](/driller/r-d-water-wells.md) | 718 | 160 | 40 | 2002–2026 |
| [Raymond Services, Inc.](/driller/raymond-services-inc.md) | 711 | 54 | 8 | 2002–2026 |
| [Master Monitoring Services, Inc.](/driller/master-monitoring-services-inc.md) | 531 | 20 | — | 1999–2007 |
| [Alliance Maintenance & Services, Inc.](/driller/alliance-maintenance-services-inc.md) | 525 | 21 | — | 2008–2015 |
| [Tolers Water Well Service](/driller/tolers-water-well-service.md) | 465 | 260 | 20 | 2003–2026 |
| [Fugro Geosciences, Inc.](/driller/fugro-geosciences-inc.md) | 435 | 33 | — | 1997–2006 |
| [A & L Pump & Well Service](/driller/a-l-pump-well-service.md) | 417 | 280 | 10 | 2003–2026 |
| [Soltek LLC](/driller/soltek-llc.md) | 371 | 25 | — | 2014–2023 |
| [City Survey](/driller/city-survey.md) | 360 | 25 | — | 2006–2026 |
| [Hildebrandt's Water Wells](/driller/hildebrandt-s-water-wells.md) | 348 | 246 | 40 | 2003–2021 |
| [Gainco, Inc.](/driller/gainco-inc.md) | 337 | 28 | 3 | 2009–2022 |
| [Van and Sons Drilling Service](/driller/van-and-sons-drilling-service.md) | 335 | 40 | — | 2013–2025 |
| [Wel-Mat Drilling LLP](/driller/wel-mat-drilling-llp.md) | 292 | 25 | — | 2000–2018 |
| [Ballard Water Well Co. LLC](/driller/ballard-water-well-co-llc.md) | 289 | 300 | 50 | 2001–2026 |
| [NORTHWEST WATER WELLS](/driller/northwest-water-wells.md) | 265 | 270 | 45 | 1999–2010 |
| [Petra Environmental](/driller/petra-environmental.md) | 252 | 16 | — | 2001–2006 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Monitor | 20,583 | 51.0% | 30 |
| Domestic | 8,171 | 20.2% | 265 |
| Environmental Soil Boring | 5,446 | 13.5% | 15 |
| Test Well | 1,338 | 3.3% | 25 |
| Injection | 1,205 | 3.0% | 39 |
| Other | 926 | 2.3% | 47 |
| Public Supply | 834 | 2.1% | 436 |
| Irrigation | 741 | 1.8% | 250 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1900s | 1 | 20 | — |
| 1960s | 1 | 2,196 | 155 |
| 1970s | 6 | 1,504 | 214 |
| 1980s | 3 | 703 | 259 |
| 1990s | 17 | 260 | 98 |
| 2000s | 15,210 | 40 | 90 |
| 2010s | 16,758 | 32 | 70 |
| 2020s | 8,398 | 30 | 85 |

### The deepest reports on file

*Deepest reports in Harris County. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 49202 | 2004 | 2,900 | 210 | 1,001 | Public Supply |
| 347799 | 2013 | 2,855 | 125 | 40 | Domestic |
| 622969 | 1979 | 2,595 | — | — | Test Well |
| 58644 | 2005 | 2,500 | 364 | 1,248 | Public Supply |
| 674394 | 2024 | 2,445 | 75 | 40 | Domestic |
| 36649 | 2004 | 2,280 | 204 | 1,500 | Public Supply |
| 269228 | 2011 | 2,220 | 120 | 10 | Domestic |
| 622968 | 1965 | 2,196 | 155 | 2,260 | Public Supply |
| 13152 | 2002 | 2,196 | 126 | 1,804 | Public Supply |
| 117233 | 2007 | 2,120 | 105 | 50 | Domestic |

Every figure on this site is a **median**, never an average. On reported yield the average is twice the median, because a handful of entries are typing errors — the largest reads 2,200,100 gallons per minute against 30,078 for the next one. Yields above 3,000 gpm (136 wells, 0.045%) and depths beyond 5,000 ft (103 wells, 0.016%) are kept in the file, marked, and left out of the medians.

### Drilling a well in Harris County?

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).

### Counties with a comparable number of reports

- [Bexar](/county/bexar.md)
- [Dallas](/county/dallas.md)
- [Tarrant](/county/tarrant.md)
- [Parker](/county/parker.md)
- [Midland](/county/midland.md)
- [Montgomery](/county/montgomery.md)
- [Gaines](/county/gaines.md)
- [Brazoria](/county/brazoria.md)
- [Travis](/county/travis.md)
- [Lubbock](/county/lubbock.md)
- [Ector](/county/ector.md)
- [Fort Bend](/county/fort-bend.md)
- [Wise](/county/wise.md)

A sliding window, not a ranking. [Every county](/county.md).

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Página: https://texas-water-wells.pages.dev/county/harris/
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