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How deep are water wells in Bulverde, Texas?

Home water wells in and around Bulverde, Texas are typically 463 to 604 feet deep (median 504 ft, 453 wells drilled in the last 10 years). Most draw from the Middle Trinity (84%), and 16% 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 $36,500.

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 pointComal County
What is under Bulverde, TexasUnderground column at the center of Bulverde: median well 504 ft, middle half 463 to 604 ft, water at 307 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 154 ftUpper TrinityMiddle Trinity: 154 to 542 ftMiddle TrinityLower Trinity: 542 to 1,068 ftLower Trinitycontinues to 1,068 ft02004006008001,000ftGround level · 1,275 ft above sea levelMedian well: 504 ftWater standing in the well from 307 ftWater level307 ftMiddle half463–604 ftMedian well504 ft

Under Bulverde, Comal County

Layers at the center of Bulverde from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 453 real wells.

Home wells in and around Bulverde

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: Bulverde and about 2 miles around it

Key figures

Typical depth (middle half)
463 to 604 feet
Median depth
504 feet
Deepest 10% are past
780 feet
Water level (median)
307 feet
207 wells
Yield (median)
15 gpm
324 wells, gallons per minute
Wells used
453
In the last 10 years
Inside the city limits
171
the rest within 2 miles
All years on file
1,193
median 520 ft, since 2000
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 307 feet below the surface (207 wells).

What is under Bulverde, TexasUnderground column at the center of Bulverde: median well 504 ft, middle half 463 to 604 ft, water at 307 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 154 ftUpper TrinityMiddle Trinity: 154 to 542 ftMiddle TrinityLower Trinity: 542 to 1,068 ftLower Trinitycontinues to 1,068 ft02004006008001,000ftGround level · 1,275 ft above sea levelMedian well: 504 ftWater standing in the well from 307 ftWater level307 ftMiddle half463–604 ftMedian well504 ft
Layers at the center of Bulverde from TWDB's Hill Country Trinity model (1 mile cells), at true depth scale. The well and the water are the median of 453 real wells.

Which formation do wells in Bulverde draw from?

Most draw from the Middle Trinity (84%), and 16% draw from the Lower Trinity, according to the state's Hill Country Trinity model (TWDB).

The bottom of the hole tells a different story: 67% reach the Lower Trinity, although only 16% take their water from it. Many drillers go past the producing layer to leave a reserve.

Layer (state's model)ShareWellsTypical depth (ft)
Middle Trinity84%370460–604
Lower Trinity16%71467–560

For 99% 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 Bulverde

From the state's model, at 1,275 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 marl0154154
Middle Trinitylimestone and sand154542388
Lower Trinitysand and limestone5421,068526

Depth over time

Home well depth in and around Bulverde has not changed meaningfully in 20 years: the median was 520 feet in 2003 to 2007 and 503 feet in 2021 to 2025 (a difference under 10% or within the margin of error).

PeriodMedian depth (ft)Wells
2001–2005505262
2006–2010520250
2011–2015555198
2016–2020522217
2021–2025503238
202649027

What a well costs in Bulverde

At the median depth for Bulverde (504 feet), a complete home well would cost roughly $15,000 to $36,500: $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 (463 to 604 feet) the range runs from $14,000 to $42,500. 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 Bulverde, Texas?

Home water wells in and around Bulverde, Texas are typically 463 to 604 feet deep (median 504 ft, 453 wells drilled in the last 10 years). One in ten goes past 780 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 Bulverde draw from?

Most draw from the Middle Trinity (84%), and 16% 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 Bulverde?

At the median depth (504 feet), a complete well would cost roughly $15,000 to $36,500, 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 Bulverde?

When the wells were finished, the water stood a median 307 feet below the surface (207 wells). The level moves with drought and from one well to the next.

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

Bulverde is inside the Comal Trinity Groundwater 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 99% 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/bulverde-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources