Texas well grid 68-21
A 7.5-minute quadrangle of the Texas state well grid, mostly in Bexar County and Comal County. 514 reports, median depth 620 ft.
514Reports
620 ftMedian depth
350 ftWater at
15 gpmMedian yield
What you will drill through in grid 68-21
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Topsoil 53, Caliche 43, Tan Limestone 34, Top Soil 31, Cream Limestone 22, Tan Lime 21 |
| 25–50 ft | Grey Rock 4, Gray Lime 4, Grey Limestone 5, Tan Lime 5, Gray L/S 4, Grey Rock & Clay 4 |
| 50–100 ft | Grey Limestone 11, Gray Limestone 8, Tan Limestone 10, Tan Rock 7, No Returns 5, Grey Rock 5 |
| 100–200 ft | Gray Limestone 13, Tan Limestone 13, Grey Limestone 12, Tan Lime 9, Grey Rock 8, Gray Clay 6 |
| 200–300 ft | Tan Limestone 17, Grey Limestone 14, Tan Lime 11, Gray Limestone 9, Gray/Tan Limestone 10, Lt.Gray Lime 10 |
| 300–500 ft | Tan Limestone 20, Gray Limestone 20, Lt.Gray Lime 13, Tan Lime 15, Grey Limestone 14, Gray Lime 12 |
| 500–1000 ft | Td 32, Gray Limestone 16, Bexar Shale 19, Cow Creek 16, Tan Limestone 11, Tan Rock 12 |
| 1000–5000 ft | Pine Island 2, No Circulation-Shale & L/S 1, Tan Cow Creek 1, Cow Creek 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 354 | 68.9% | 720 |
| Environmental Soil Boring | 98 | 19.1% | 15 |
| Monitor | 29 | 5.6% | 40 |
| Public Supply | 12 | 2.3% | 870 |
| Closed-Loop Geothermal | 6 | 1.2% | 300 |
| Irrigation | 6 | 1.2% | 700 |
| Stock | 4 | 0.8% | 484 |
| Industrial | 4 | 0.8% | 500 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1990s | 1 | — | 225 |
| 2000s | 162 | 620 | 310 |
| 2010s | 242 | 580 | 343 |
| 2020s | 109 | 740 | 403 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 156157 | 2003 | 1,140 | 265 | 500 | Public Supply |
| 175864 | 2009 | 1,120 | 587 | 25 | Domestic |
| 180597 | 2009 | 1,100 | — | — | Domestic |
| 416381 | 2015 | 1,040 | 440 | 15 | Domestic |
| 715005 | 2025 | 1,000 | 468 | — | Domestic |
| 656778 | 2023 | 1,000 | 418 | — | Domestic |
| 485102 | 2018 | 1,000 | 140 | 25 | Domestic |
| 563520 | 2020 | 980 | 356 | 50 | Domestic |
| 543922 | 2020 | 980 | 390 | 50 | Domestic |
| 28341 | 2003 | 980 | 366 | 45 | Public Supply |
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 68-21?
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.
This grid falls in Bexar County, Comal County, Blanco County.