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How deep are water wells in Westlake, Texas?

Home water wells in and around Westlake, Texas vary a lot in depth: the middle half are 130 to 725 feet deep (median 200 ft, 59 wells drilled in the last 10 years), so look at the wells closest to the tract. No single layer dominates: 46% draw from the upper Trinity (Paluxy and Glen Rose) and 41% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), according to the state's Northern Trinity and Woodbine model (TWDB). Estimated cost of a complete well at the median depth: $7,500 to $18,500.

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 pointTarrant County
What is under Westlake, TexasUnderground column at the center of Westlake: median well 200 ft, middle half 130 to 725 ft, water at 40 ft, and the layers of the state's model with their thickness.Washita and Fredericksburg: 0 to 543 ftWashita and Frederick…Upper Trinity: 543 to 1,049 ftUpper Trinitycontinues to 1,369 ft02004006008001,000ftGround level · 685 ft above sea levelMedian well: 200 ftWater standing in the well from 40 ftWater level40 ftMedian well200 ftMiddle half130–725 ft

Under Westlake, Tarrant County

Layers at the center of Westlake from TWDB's Northern Trinity and Woodbine model (quarter mile cells, summarized here to about 1.3 miles), at true depth scale. The well and the water are the median of 59 real wells.

Home wells in and around Westlake

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: Westlake and about 2 miles around it

Key figures

Typical depth (middle half)
130 to 725 feet
Median depth
200 feet
Deepest 10% are past
780 feet
Water level (median)
40 feet
41 wells
Yield (median)
17 gpm
56 wells, gallons per minute
Wells used
59
In the last 10 years
Inside the city limits
19
the rest within 2 miles
All years on file
128
median 560 ft, since 2001
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 40 feet below the surface (41 wells), well above the bottom: the typical well holds about 160 feet of water.

What is under Westlake, TexasUnderground column at the center of Westlake: median well 200 ft, middle half 130 to 725 ft, water at 40 ft, and the layers of the state's model with their thickness.Washita and Fredericksburg: 0 to 543 ftWashita and Frederick…Upper Trinity: 543 to 1,049 ftUpper Trinitycontinues to 1,369 ft02004006008001,000ftGround level · 685 ft above sea levelMedian well: 200 ftWater standing in the well from 40 ftWater level40 ftMedian well200 ftMiddle half130–725 ft
Layers at the center of Westlake from TWDB's Northern Trinity and Woodbine model (quarter mile cells, summarized here to about 1.3 miles), at true depth scale. The well and the water are the median of 59 real wells.

Which formation do wells in Westlake draw from?

No single layer dominates: 46% draw from the upper Trinity (Paluxy and Glen Rose) and 41% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), according to the state's Northern Trinity and Woodbine model (TWDB).

The bottom of the hole tells a different story: 49% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), although only 41% take their water from there. Many drillers go past the producing layer to leave a reserve.

Layer (state's model)ShareWellsTypical depth (ft)
Upper TrinityPaluxy and Glen Rose46%27620–770
At or just below the base of the WoodbineWashita and Fredericksburg41%24120–165
Woodbine14%8120–130

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.

The layers under the center of Westlake

From the state's model, at 685 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)
Washita and Fredericksburglimestone, marl and clay0543543
Upper Trinitysandstone, limestone and marl5431,049506
Lower Trinitysandstone with shale and limestone1,0491,369320

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 Westlake are getting deeper. For reference, the median was 544 feet in 2001 to 2005 (19 wells) and 200 feet in 2021 to 2025 (43 wells).

PeriodMedian depth (ft)Wells
2001–200554419
2006–201079015
2011–201560932
2016–202019018
2021–202520043
2026under 10 wells1

What a well costs in Westlake

At the median depth for Westlake (200 feet), a complete home well would cost roughly $7,500 to $18,500: $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 (130 to 725 feet) the range runs from $6,000 to $50,000. 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 Westlake, Texas?

Home water wells in and around Westlake, Texas vary a lot in depth: the middle half are 130 to 725 feet deep (median 200 ft, 59 wells drilled in the last 10 years), so look at the wells closest to the tract. 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 Westlake draw from?

No single layer dominates: 46% draw from the upper Trinity (Paluxy and Glen Rose) and 41% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), according to the state's Northern Trinity and Woodbine 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 Westlake?

At the median depth (200 feet), a complete well would cost roughly $7,500 to $18,500, 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 Westlake?

When the wells were finished, the water stood a median 40 feet below the surface (41 wells), well above the bottom: the typical well holds about 160 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 Westlake?

Westlake is inside the Northern 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 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 7,977 wells in the area of the state's Northern Trinity and Woodbine model (North and Central Texas) 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 74% of them, and that layer or the one next to it in at least 95%; among the 3,130 of those wells that the state places in a Trinity layer (Paluxy to Hosston) it is about 56%.

  • The layers come from the Texas Water Development Board's Northern Trinity and Woodbine model, with quarter mile cells, summarized here to about 1.3 miles. 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.
  • In this model every layer is at least 30 feet thick, even where the real rock is thinner or missing. Thin layers and the edges of the model are approximate.
  • Inside the Trinity this atlas does not name single model layers: it groups the Paluxy and Glen Rose (upper Trinity) and groups the Hensell, Pearsall and Hosston (lower Trinity, Twin Mountains and Travis Peak), because the check against the state's codes shows the method cannot separate them reliably.
  • "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/westlake-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources