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How deep are water wells in Cedar Park, Texas?

Home water wells in and around Cedar Park, Texas are typically 680 to 830 feet deep (median 750 ft, 137 wells drilled in the last 10 years). Most draw from the upper Trinity (Paluxy and Glen Rose, 59%), and 41% draw from the lower Trinity (Twin Mountains and Travis Peak), according to the state's Northern Trinity and Woodbine model (TWDB). New wells run about 12% deeper than 20 years ago (median 690 ft in 2003 to 2007, 770 ft in 2021 to 2025). Estimated cost of a complete well at the median depth: $21,500 to $51,500.

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 pointWilliamson County
What is under Cedar Park, TexasUnderground column at the center of Cedar Park: median well 750 ft, middle half 680 to 830 ft, water at 436 ft, and the layers of the state's model with their thickness.Washita and Fredericksburg: 0 to 373 ftWashita and Frederick…Upper Trinity: 373 to 898 ftUpper TrinityLower Trinity: 898 to 1,803 ftLower Trinitycontinues to 1,803 ft02004006008001,000ftGround level · 942 ft above sea levelMedian well: 750 ftWater standing in the well from 436 ftWater level436 ftMiddle half680–830 ftMedian well750 ft

Under Cedar Park, Williamson County

Layers at the center of Cedar Park 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 137 real wells.

Home wells in and around Cedar Park

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: Cedar Park and about 2 miles around it

Key figures

Typical depth (middle half)
680 to 830 feet
Median depth
750 feet
Deepest 10% are past
854 feet
Water level (median)
436 feet
98 wells
Yield (median)
30 gpm
126 wells, gallons per minute
Wells used
137
In the last 10 years
Inside the city limits
24
the rest within 2 miles
All years on file
396
median 742 ft, since 1998
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 436 feet below the surface (98 wells).

What is under Cedar Park, TexasUnderground column at the center of Cedar Park: median well 750 ft, middle half 680 to 830 ft, water at 436 ft, and the layers of the state's model with their thickness.Washita and Fredericksburg: 0 to 373 ftWashita and Frederick…Upper Trinity: 373 to 898 ftUpper TrinityLower Trinity: 898 to 1,803 ftLower Trinitycontinues to 1,803 ft02004006008001,000ftGround level · 942 ft above sea levelMedian well: 750 ftWater standing in the well from 436 ftWater level436 ftMiddle half680–830 ftMedian well750 ft
Layers at the center of Cedar Park 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 137 real wells.

Which formation do wells in Cedar Park draw from?

Most draw from the upper Trinity (Paluxy and Glen Rose, 59%), and 41% draw from the lower Trinity (Twin Mountains and Travis Peak), according to the state's Northern Trinity and Woodbine model (TWDB).

Layer (state's model)ShareWellsTypical depth (ft)
Upper TrinityPaluxy and Glen Rose59%81725–850
Lower TrinityTwin Mountains and Travis Peak41%56558–732

For 90% 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 Cedar Park

From the state's model, at 942 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 clay0373373
Upper Trinitysandstone, limestone and marl373898524
Lower Trinitysandstone with shale and limestone8981,803906

Depth over time

New home wells in and around Cedar Park are deeper than 20 years ago: the median went from 690 feet (2003 to 2007) to 770 feet (2021 to 2025), 12% more. Deeper wells do not always mean the water dropped: a driller may be going for another layer, better water or more reserve.

PeriodMedian depth (ft)Wells
2001–200568858
2006–201072585
2011–2015760103
2016–202071064
2021–202577077
2026under 10 wells6

What a well costs in Cedar Park

At the median depth for Cedar Park (750 feet), a complete home well would cost roughly $21,500 to $51,500: $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 (680 to 830 feet) the range runs from $19,500 to $56,500. 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 Cedar Park, Texas?

Home water wells in and around Cedar Park, Texas are typically 680 to 830 feet deep (median 750 ft, 137 wells drilled in the last 10 years). One in ten goes past 854 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 Cedar Park draw from?

Most draw from the upper Trinity (Paluxy and Glen Rose, 59%), and 41% draw from the lower Trinity (Twin Mountains and Travis Peak), 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 Cedar Park?

At the median depth (750 feet), a complete well would cost roughly $21,500 to $51,500, 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 Cedar Park?

When the wells were finished, the water stood a median 436 feet below the surface (98 wells). The level moves with drought and from one well to the next.

Do I need a permit to drill a well in Cedar Park?

In the state's boundary file (current as of November 2019) no groundwater conservation district covers Cedar Park. Districts created or enlarged since then are missing from that file, so confirm with the county or TWDB before drilling. Anywhere in Texas the well must be drilled by a licensed driller, who files the report with the state.

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 90% 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/cedar-park-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources