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How deep are water wells in Bandera, Texas?

Home water wells in and around Bandera, Texas are typically 455 to 550 feet deep (median 490 ft, 35 wells drilled in the last 10 years). Most draw from the Middle Trinity (77%), and 23% draw from the Lower Trinity, according to the state's Hill Country Trinity model (TWDB). Estimated cost of a complete well at the median depth: $15,000 to $36,000.

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 pointBandera County
What is under Bandera, TexasUnderground column at the center of Bandera: median well 490 ft, middle half 455 to 550 ft, water at 198 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 19 ftMiddle Trinity: 19 to 401 ftMiddle TrinityLower Trinity: 401 to 849 ftLower Trinitycontinues to 849 ft0200400600800ftGround level · 1,244 ft above sea levelMedian well: 490 ftWater standing in the well from 198 ftWater level198 ftMiddle half455–550 ftMedian well490 ft

Under Bandera, Bandera County

Layers at the center of Bandera from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 35 real wells.

Home wells in and around Bandera

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: Bandera and about 2 miles around it

Key figures

Typical depth (middle half)
455 to 550 feet
Median depth
490 feet
Deepest 10% are past
642 feet
Water level (median)
198 feet
33 wells
Yield (median)
30 gpm
31 wells, gallons per minute
Wells used
35
In the last 10 years
Inside the city limits
2
the rest within 2 miles
All years on file
107
median 470 ft, since 2002
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 198 feet below the surface (33 wells), well above the bottom: the typical well holds about 292 feet of water.

What is under Bandera, TexasUnderground column at the center of Bandera: median well 490 ft, middle half 455 to 550 ft, water at 198 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 19 ftMiddle Trinity: 19 to 401 ftMiddle TrinityLower Trinity: 401 to 849 ftLower Trinitycontinues to 849 ft0200400600800ftGround level · 1,244 ft above sea levelMedian well: 490 ftWater standing in the well from 198 ftWater level198 ftMiddle half455–550 ftMedian well490 ft
Layers at the center of Bandera from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 35 real wells.

Which formation do wells in Bandera draw from?

Most draw from the Middle Trinity (77%), and 23% draw from the Lower Trinity, according to the state's Hill Country Trinity model (TWDB).

The bottom of the hole tells a different story: 77% reach the Lower Trinity, although only 23% take their water from it. Many drillers go past the producing layer to leave a reserve.

Layer (state's model)ShareWellsTypical depth (ft)
Middle Trinity77%27450–575
Lower Trinity23%8475–535

For 100% of these wells the report says where the water enters (the screen or the open hole), and we use the middle of that interval.

The layers under the center of Bandera

From the state's model, at 1,244 feet above sea level. These are the model's depths at that one point, not those of any particular lot.

Depths in feet below ground.
Layer (state's model)Top (ft)Bottom (ft)Thickness (ft)
Upper Trinitylimestone and marl01919
Middle Trinitylimestone and sand19401382
Lower Trinitysand and limestone401849449

Depth over time

There are not enough wells in both 2003 to 2007 and 2021 to 2025 (at least 30 in each) to say with confidence whether wells in and around Bandera are getting deeper. For reference, the median was 440 feet in 2001 to 2005 (31 wells) and 530 feet in 2021 to 2025 (21 wells).

PeriodMedian depth (ft)Wells
2001–200544031
2006–201047023
2011–201550017
2016–202048014
2021–202553021
2026under 10 wells1

What a well costs in Bandera

At the median depth for Bandera (490 feet), a complete home well would cost roughly $15,000 to $36,000: $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 (455 to 550 feet) the range runs from $14,000 to $39,500. 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 Bandera, Texas?

Home water wells in and around Bandera, Texas are typically 455 to 550 feet deep (median 490 ft, 35 wells drilled in the last 10 years). One in ten goes past 642 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 Bandera draw from?

Most draw from the Middle Trinity (77%), and 23% draw from the Lower 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 Bandera?

At the median depth (490 feet), a complete well would cost roughly $15,000 to $36,000, 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 Bandera?

When the wells were finished, the water stood a median 198 feet below the surface (33 wells), well above the bottom: the typical well holds about 292 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 Bandera?

Bandera is inside the Bandera County River Authority and Groundwater 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 100% 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/bandera-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources