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How deep are water wells in Stonewall, Texas?

Home water wells in and around Stonewall, Texas are typically 180 to 432 feet deep (median 282 ft, 102 wells drilled in the last 10 years). The state's model covers only 32% of these wells (33); among those, 73% end near or below the base of the Trinity, and 27% draw from the Middle Trinity, according to the state's Hill Country Trinity model (TWDB). Estimated cost of a complete well at the median depth: $9,500 to $23,500.

Updated every day from Texas Water Development Board driller reports. Last update: November 11, 2026, using the state file of November 10, 2026.

See the wells and layers at an exact pointGillespie County
What is under Stonewall, TexasUnderground column at the center of Stonewall: median well 282 ft, middle half 180 to 432 ft, water at 86 ft.No state layer model here yet0200400600800ftGround levelMedian well: 282 ftWater standing in the well from 86 ftWater level86 ftMiddle half180–432 ftMedian well282 ft

Under Stonewall, Gillespie County

The well and the water are the median of 102 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Stonewall

Each dot is a home well from a state driller report, colored by depth. Tap one for its details and official report. Tap an empty spot to see what is under that point.

See underground

Well depth (ft)

  • <100
  • 100
  • 200
  • 300
  • 400
  • 600
  • 800+

Dashed line: Stonewall and about 2 miles around it

Key figures

Typical depth (middle half)
180 to 432 feet
Median depth
282 feet
Deepest 10% are past
637 feet
Water level (median)
86 feet
83 wells
Yield (median)
38 gpm
97 wells, gallons per minute
Wells used
102
In the last 10 years
Inside the city limits
91
the rest within 2 miles
All years on file
280
median 278 ft, since 2001
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 86 feet below the surface (83 wells), well above the bottom: the typical well holds about 196 feet of water.

What is under Stonewall, TexasUnderground column at the center of Stonewall: median well 282 ft, middle half 180 to 432 ft, water at 86 ft.No state layer model here yet0200400600800ftGround levelMedian well: 282 ftWater standing in the well from 86 ftWater level86 ftMiddle half180–432 ftMedian well282 ft
The well and the water are the median of 102 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Stonewall draw from?

The state's model covers only 32% of these wells (33); among those, 73% end near or below the base of the Trinity, and 27% draw from the Middle Trinity, according to the state's Hill Country Trinity model (TWDB).

Going by the bottom of the hole instead of where the water enters, 91% reach near or below the base of the Trinity. 91% of the wells bottom out near or below the base of the Trinity in the model, often within tens of feet of it; older rock may lie there.

Layer (state's model)ShareWellsTypical depth (ft)
Near or below the base of the Trinity73%24200–373
Middle Trinity27%9158–210

For 97% of these wells the report says where the water enters (the screen or the open hole), and we use the middle of that interval.

Depth over time

Home well depth in and around Stonewall has not changed meaningfully in 20 years: the median was 330 feet in 2003 to 2007 and 322 feet in 2021 to 2025 (a difference under 10% or within the margin of error).

PeriodMedian depth (ft)Wells
2001–200525248
2006–201034067
2011–201524252
2016–202024053
2021–202532254
2026under 10 wells6

What a well costs in Stonewall

At the median depth for Stonewall (282 feet), a complete home well would cost roughly $9,500 to $23,500: $25 to $60 per foot for drilling, casing and seal, plus $2,500 to $6,500 for the pump, pressure tank, controls and hookup at the well. Across the whole middle half of depths (180 to 432 feet) the range runs from $7,000 to $32,500. This is TerraFunded's estimate from published Texas prices, not a quote, and it leaves out trenching and the line to the house. Get prices from at least two licensed drillers.

Where it sits

Nearby places

Median depth of home wells in each place.

All Texas cities and towns

Common questions

How deep do you have to drill a well in Stonewall, Texas?

Home water wells in and around Stonewall, Texas are typically 180 to 432 feet deep (median 282 ft, 102 wells drilled in the last 10 years). One in ten goes past 637 feet. The depth a given tract needs depends on where it sits and what layers the driller hits.

What aquifer or formation do wells in Stonewall draw from?

The state's model covers only 32% of these wells (33); among those, 73% end near or below the base of the Trinity, and 27% draw from the Middle Trinity, according to the state's Hill Country Trinity model (TWDB). This is an estimate from the state's regional model, not a survey of the lot.

How much does a water well cost in Stonewall?

At the median depth (282 feet), a complete well would cost roughly $9,500 to $23,500, by TerraFunded's estimate from published Texas driller prices. The real price comes from a licensed driller's quote.

How deep is the water in Stonewall?

When the wells were finished, the water stood a median 86 feet below the surface (83 wells), well above the bottom: the typical well holds about 196 feet of water. The level moves with drought and from one well to the next.

Do I need a permit to drill a well in Stonewall?

Stonewall is inside the Hill Country Underground Water Conservation District. Groundwater conservation districts in Texas can require registering or permitting a new well, keeping set distances from property lines and other wells, and paying fees. Rules differ from district to district: ask the district before drilling.

How these numbers are made

We count new and replacement domestic (home) wells whose coordinates fall inside the place boundary or within 2 miles of it. We use the last 10 years when there are at least 30 wells; otherwise all since 2001. The median is the middle well and the middle half runs from the 25th to the 75th percentile.

To tell which layer a well draws from, we take the ground elevation at its location, subtract the depth of the interval where water enters (or the bottom of the hole when the report does not give one) and see which layer of the state's model that point falls in.

For 97% of these wells the report says where the water enters (the screen or the open hole), and we use the middle of that interval.

How well it works: In 2,665 wells in the Texas Hill Country where the State of Texas recorded the aquifer, our estimate of the formation the well draws from names the same layer of the state's model in about 76% of them, and that layer or the one next to it in at least 98%.

  • The layers come from the Texas Water Development Board's Hill Country Trinity model, with 1 mile cells. It is a regional model, not a survey of any lot: between one model point and the next, the real depth of each layer can differ.
  • "Near or below the base of the Trinity" means the well reaches the bottom of the model or passes it, often by tens of feet. Older rock that the model does not include may lie there.
  • We never use the model's water levels. The water level on this page is the one each driller measured when the well was finished.

These are depths of real wells drilled nearby, not a promise about any property. Groundwater can change over short distances and with drought. A licensed water well driller can tell you what to expect on a specific tract.

Read the full methodology · Download the data (CSV, CC BY 4.0)

How to cite

TerraFunded (2026). Texas Well Atlas: Underground. From Texas Water Development Board driller reports and groundwater availability models (data as of November 10, 2026). https://terrafunded.com/wells/places/stonewall-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources