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How deep are water wells in Lampasas, Texas?

Home water wells in and around Lampasas, Texas are typically 200 to 330 feet deep (median 257 ft, 65 wells drilled in the last 10 years). No single layer dominates: 54% end near or below the base of the Trinity and 46% draw from the lower Trinity (Twin Mountains and Travis Peak), according to the state's Northern Trinity and Woodbine model (TWDB). Estimated cost of a complete well at the median depth: $9,000 to $22,000.

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 pointLampasas County
What is under Lampasas, TexasUnderground column at the center of Lampasas: median well 257 ft, middle half 200 to 330 ft, water at 90 ft, and the layers of the state's model with their thickness.Lower Trinity: 0 to 109 ftLower TrinityBelow the base of the Trinity0200400600ftGround level · 1,058 ft above sea levelMedian well: 257 ftWater standing in the well from 90 ftWater level90 ftMiddle half200–330 ftMedian well257 ft

Under Lampasas, Lampasas County

Layers at the center of Lampasas 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 Lampasas

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: Lampasas and about 2 miles around it

Key figures

Typical depth (middle half)
200 to 330 feet
Median depth
257 feet
Deepest 10% are past
498 feet
Water level (median)
90 feet
13 wells
Yield (median)
12 gpm
51 wells, gallons per minute
Wells used
65
In the last 10 years
Inside the city limits
12
the rest within 2 miles
All years on file
123
median 252 ft, since 2002
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 90 feet below the surface (13 wells), well above the bottom: the typical well holds about 167 feet of water.

What is under Lampasas, TexasUnderground column at the center of Lampasas: median well 257 ft, middle half 200 to 330 ft, water at 90 ft, and the layers of the state's model with their thickness.Lower Trinity: 0 to 109 ftLower TrinityBelow the base of the Trinity0200400600ftGround level · 1,058 ft above sea levelMedian well: 257 ftWater standing in the well from 90 ftWater level90 ftMiddle half200–330 ftMedian well257 ft
Layers at the center of Lampasas 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 Lampasas draw from?

No single layer dominates: 54% end near or below the base of the Trinity and 46% draw from the lower Trinity (Twin Mountains and Travis Peak), according to the state's Northern Trinity and Woodbine model (TWDB).

Going by the bottom of the hole instead of where the water enters, 83% reach near or below the base of the Trinity. 83% of the wells bottom out near or below the base of the Trinity in the model, often within tens of feet of it; older rock may lie there.

Layer (state's model)ShareWellsTypical depth (ft)
Near or below the base of the Trinity54%35260–468
Lower TrinityTwin Mountains and Travis Peak46%30145–228

For 82% of these wells the report says where the water enters and we use the middle of that interval; for the rest we use the bottom of the hole, which tends to read one layer too deep.

The layers under the center of Lampasas

From the state's model, at 1,058 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)
Lower Trinitysandstone with shale and limestone0109109

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 Lampasas are getting deeper. For reference, the median was 278 feet in 2001 to 2005 (16 wells) and 300 feet in 2021 to 2025 (33 wells).

PeriodMedian depth (ft)Wells
2001–200527816
2006–201026021
2011–201519216
2016–202022537
2021–202530033

What a well costs in Lampasas

At the median depth for Lampasas (257 feet), a complete home well would cost roughly $9,000 to $22,000: $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 (200 to 330 feet) the range runs from $7,500 to $26,500. 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 Lampasas, Texas?

Home water wells in and around Lampasas, Texas are typically 200 to 330 feet deep (median 257 ft, 65 wells drilled in the last 10 years). One in ten goes past 498 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 Lampasas draw from?

No single layer dominates: 54% end near or below the base of the Trinity and 46% 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 Lampasas?

At the median depth (257 feet), a complete well would cost roughly $9,000 to $22,000, 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 Lampasas?

When the wells were finished, the water stood a median 90 feet below the surface (13 wells), well above the bottom: the typical well holds about 167 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 Lampasas?

Lampasas is inside the Saratoga 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 82% of these wells the report says where the water enters and we use the middle of that interval; for the rest we use the bottom of the hole, which tends to read one layer too deep.

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

Sources