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How deep are water wells in Killeen, Texas?

Home water wells in and around Killeen, Texas are typically 510 to 794 feet deep (median 600 ft, 98 wells drilled in the last 10 years). Most draw from the lower Trinity (Twin Mountains and Travis Peak, 80%), according to the state's Northern Trinity and Woodbine model (TWDB). New wells run about 23% deeper than 20 years ago (median 532 ft in 2003 to 2007, 656 ft in 2021 to 2025). Estimated cost of a complete well at the median depth: $17,500 to $42,500.

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 pointBell County
What is under Killeen, TexasUnderground column at the center of Killeen: median well 600 ft, middle half 510 to 794 ft, water at 408 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 593 ftUpper TrinityLower Trinity: 593 to 782 ftLower TrinityBelow the base of the Trinity02004006008001,000ftGround level · 897 ft above sea levelMedian well: 600 ftWater standing in the well from 408 ftWater level408 ftMiddle half510–794 ftMedian well600 ft

Under Killeen, Bell County

Layers at the center of Killeen 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 98 real wells.

Home wells in and around Killeen

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: Killeen and about 2 miles around it

Key figures

Typical depth (middle half)
510 to 794 feet
Median depth
600 feet
Deepest 10% are past
843 feet
Water level (median)
408 feet
54 wells
Yield (median)
27.5 gpm
90 wells, gallons per minute
Wells used
98
In the last 10 years
Inside the city limits
8
the rest within 2 miles
All years on file
208
median 565 ft, since 2003
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 408 feet below the surface (54 wells).

What is under Killeen, TexasUnderground column at the center of Killeen: median well 600 ft, middle half 510 to 794 ft, water at 408 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 593 ftUpper TrinityLower Trinity: 593 to 782 ftLower TrinityBelow the base of the Trinity02004006008001,000ftGround level · 897 ft above sea levelMedian well: 600 ftWater standing in the well from 408 ftWater level408 ftMiddle half510–794 ftMedian well600 ft
Layers at the center of Killeen 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 98 real wells.

Which formation do wells in Killeen draw from?

Most draw from the lower Trinity (Twin Mountains and Travis Peak, 80%), according to the state's Northern Trinity and Woodbine model (TWDB).

Layer (state's model)ShareWellsTypical depth (ft)
Lower TrinityTwin Mountains and Travis Peak80%78524–800
Upper TrinityPaluxy and Glen Rose13%13520–776
Washita and Fredericksburg6%6100–116
Near or below the base of the Trinity1%1—

For 100% 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 Killeen

From the state's model, at 897 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 Trinitysandstone, limestone and marl0593593
Lower Trinitysandstone with shale and limestone593782189

Depth over time

New home wells in and around Killeen are deeper than 20 years ago: the median went from 532 feet (2003 to 2007) to 656 feet (2021 to 2025), 23% 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
2001–200553523
2006–201056041
2011–201550242
2016–202051836
2021–202565661
2026under 10 wells5

What a well costs in Killeen

At the median depth for Killeen (600 feet), a complete home well would cost roughly $17,500 to $42,500: $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 (510 to 794 feet) the range runs from $15,500 to $54,000. 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 Killeen, Texas?

Home water wells in and around Killeen, Texas are typically 510 to 794 feet deep (median 600 ft, 98 wells drilled in the last 10 years). One in ten goes past 843 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 Killeen draw from?

Most draw from the lower Trinity (Twin Mountains and Travis Peak, 80%), 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 Killeen?

At the median depth (600 feet), a complete well would cost roughly $17,500 to $42,500, 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 Killeen?

When the wells were finished, the water stood a median 408 feet below the surface (54 wells). The level moves with drought and from one well to the next.

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

Killeen is inside the Clearwater Underground Water 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 100% 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/killeen-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources