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How deep are water wells in Grand Prairie, Texas?

Home water wells in and around Grand Prairie, Texas are typically 300 to 380 feet deep (median 320 ft, 65 wells reported since 2001). Most are completed in the Woodbine Aquifer (79%), and 15% 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: $10,500 to $25,500.

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 pointDallas County
What is under Grand Prairie, TexasUnderground column at the center of Grand Prairie: median well 320 ft, middle half 300 to 380 ft, water at 188 ft, and the layers of the state's model with their thickness.Above the Woodbine: 0 to 125 ftAbove the WoodbineWoodbine: 125 to 429 ftWoodbineWashita and Fredericksburg: 429 to 942 ftWashita and Frederick…continues to 2,024 ft0100200300400500ftGround level · 537 ft above sea levelMedian well: 320 ftWater standing in the well from 188 ftWater level188 ftMiddle half300–380 ftMedian well320 ft

Under Grand Prairie, Dallas County

Layers at the center of Grand Prairie 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 65 real wells.

Home wells in and around Grand Prairie

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: Grand Prairie and about 2 miles around it

Key figures

Typical depth (middle half)
300 to 380 feet
Median depth
320 feet
Deepest 10% are past
470 feet
Water level (median)
188 feet
58 wells
Yield (median)
18 gpm
61 wells, gallons per minute
Wells used
65
Since 2001
Inside the city limits
23
the rest within 2 miles
All years on file
65
median 320 ft, since 2002
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 188 feet below the surface (58 wells).

What is under Grand Prairie, TexasUnderground column at the center of Grand Prairie: median well 320 ft, middle half 300 to 380 ft, water at 188 ft, and the layers of the state's model with their thickness.Above the Woodbine: 0 to 125 ftAbove the WoodbineWoodbine: 125 to 429 ftWoodbineWashita and Fredericksburg: 429 to 942 ftWashita and Frederick…continues to 2,024 ft0100200300400500ftGround level · 537 ft above sea levelMedian well: 320 ftWater standing in the well from 188 ftWater level188 ftMiddle half300–380 ftMedian well320 ft
Layers at the center of Grand Prairie 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 65 real wells.

Which formation do wells in Grand Prairie draw from?

Most are completed in the Woodbine Aquifer (79%), and 15% 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).

Only 68% bottom out inside the Woodbine Aquifer: the rest keep going deeper but take their water from that layer.

Layer (state's model)ShareWellsTypical depth (ft)
Woodbine79%51300–340
At or just below the base of the WoodbineWashita and Fredericksburg15%10312–444
Upper TrinityPaluxy and Glen Rose5%3—
Above the Woodbine2%1—

Only 43% of these wells have the water-bearing interval on their report (reports before about 2012 rarely do). For the others we use the bottom of the hole, which tends to read one layer deeper than where the water actually comes from.

The layers under the center of Grand Prairie

From the state's model, at 537 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)
Above the Woodbineshale, chalk and marl0125125
Woodbinesandstone with shale125429304
Washita and Fredericksburglimestone, marl and clay429942513
Upper Trinitysandstone, limestone and marl9421,571630
Lower Trinitysandstone with shale and limestone1,5712,024453

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 Grand Prairie are getting deeper. For reference, the median was 320 feet in 2001 to 2005 (11 wells) and 325 feet in 2021 to 2025 (13 wells).

PeriodMedian depth (ft)Wells
2001–200532011
2006–201030516
2011–201532015
2016–202031010
2021–202532513

What a well costs in Grand Prairie

At the median depth for Grand Prairie (320 feet), a complete home well would cost roughly $10,500 to $25,500: $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 (300 to 380 feet) the range runs from $10,000 to $29,500. 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 Grand Prairie, Texas?

Home water wells in and around Grand Prairie, Texas are typically 300 to 380 feet deep (median 320 ft, 65 wells reported since 2001). One in ten goes past 470 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 Grand Prairie draw from?

Most are completed in the Woodbine Aquifer (79%), and 15% 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 Grand Prairie?

At the median depth (320 feet), a complete well would cost roughly $10,500 to $25,500, 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 Grand Prairie?

When the wells were finished, the water stood a median 188 feet below the surface (58 wells). The level moves with drought and from one well to the next.

Do I need a permit to drill a well in Grand Prairie?

Grand Prairie 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.

Only 43% of these wells have the water-bearing interval on their report (reports before about 2012 rarely do). For the others we use the bottom of the hole, which tends to read one layer deeper than where the water actually comes from.

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/grand-prairie-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources