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How deep are water wells in Lake Medina Shores, Texas?

Home water wells in and around Lake Medina Shores, Texas are typically 410 to 495 feet deep (median 460 ft, 47 wells drilled in the last 10 years). Nearly all draw from the Middle Trinity (98%), according to the state's Hill Country Trinity model (TWDB). Estimated cost of a complete well at the median depth: $14,000 to $34,000.

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 Lake Medina Shores, TexasUnderground column at the center of Lake Medina Shores: median well 460 ft, middle half 410 to 495 ft, water at 120 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 70 ftUpper TrinityMiddle Trinity: 70 to 560 ftMiddle TrinityLower Trinity: 560 to 1,154 ftLower Trinitycontinues to 1,154 ft0200400600ftGround level · 1,139 ft above sea levelMedian well: 460 ftWater standing in the well from 120 ftWater level120 ftMiddle half410–495 ftMedian well460 ft

Under Lake Medina Shores, Bandera County

Layers at the center of Lake Medina Shores from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 47 real wells.

Home wells in and around Lake Medina Shores

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: Lake Medina Shores and about 2 miles around it

Key figures

Typical depth (middle half)
410 to 495 feet
Median depth
460 feet
Deepest 10% are past
514 feet
Water level (median)
120 feet
42 wells
Yield (median)
40 gpm
40 wells, gallons per minute
Wells used
47
In the last 10 years
Inside the city limits
14
the rest within 2 miles
All years on file
154
median 460 ft, since 2003
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 120 feet below the surface (42 wells), well above the bottom: the typical well holds about 340 feet of water.

What is under Lake Medina Shores, TexasUnderground column at the center of Lake Medina Shores: median well 460 ft, middle half 410 to 495 ft, water at 120 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 70 ftUpper TrinityMiddle Trinity: 70 to 560 ftMiddle TrinityLower Trinity: 560 to 1,154 ftLower Trinitycontinues to 1,154 ft0200400600ftGround level · 1,139 ft above sea levelMedian well: 460 ftWater standing in the well from 120 ftWater level120 ftMiddle half410–495 ftMedian well460 ft
Layers at the center of Lake Medina Shores from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 47 real wells.

Which formation do wells in Lake Medina Shores draw from?

Nearly all draw from the Middle Trinity (98%), according to the state's Hill Country Trinity model (TWDB).

Only 81% bottom out inside the Middle Trinity: the rest keep going deeper but take their water from that layer.

Layer (state's model)ShareWellsTypical depth (ft)
Middle Trinity98%46412–498
Upper Trinity2%1—

For 98% 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 Lake Medina Shores

From the state's model, at 1,139 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 marl07070
Middle Trinitylimestone and sand70560490
Lower Trinitysand and limestone5601,154594

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 Lake Medina Shores are getting deeper. For reference, the median was 420 feet in 2001 to 2005 (38 wells) and 470 feet in 2021 to 2025 (21 wells).

PeriodMedian depth (ft)Wells
2001–200542038
2006–201047048
2011–201546018
2016–202045526
2021–202547021
2026under 10 wells3

What a well costs in Lake Medina Shores

At the median depth for Lake Medina Shores (460 feet), a complete home well would cost roughly $14,000 to $34,000: $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 (410 to 495 feet) the range runs from $13,000 to $36,000. 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 Lake Medina Shores, Texas?

Home water wells in and around Lake Medina Shores, Texas are typically 410 to 495 feet deep (median 460 ft, 47 wells drilled in the last 10 years). One in ten goes past 514 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 Lake Medina Shores draw from?

Nearly all draw from the Middle Trinity (98%), 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 Lake Medina Shores?

At the median depth (460 feet), a complete well would cost roughly $14,000 to $34,000, 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 Lake Medina Shores?

When the wells were finished, the water stood a median 120 feet below the surface (42 wells), well above the bottom: the typical well holds about 340 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 Lake Medina Shores?

Lake Medina Shores 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 98% 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/lake-medina-shores-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources