Skip to content
ENES
Marketplace

How deep are water wells in Walnut Springs, Texas?

Home water wells in and around Walnut Springs, Texas are typically 200 to 339 feet deep (median 220 ft, 31 wells drilled in the last 10 years). Most draw from the upper Trinity (Paluxy and Glen Rose, 74%), and 23% 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: $8,000 to $19,500.

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 pointBosque County
What is under Walnut Springs, TexasUnderground column at the center of Walnut Springs: median well 220 ft, middle half 200 to 339 ft, water at 135 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 494 ftUpper TrinityLower Trinity: 494 to 753 ftLower TrinityBelow the base of the Trinity0200400600800ftGround level · 946 ft above sea levelMedian well: 220 ftWater standing in the well from 135 ftWater level135 ftMiddle half200–339 ftMedian well220 ft

Under Walnut Springs, Bosque County

Layers at the center of Walnut Springs 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 31 real wells.

Home wells in and around Walnut Springs

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: Walnut Springs and about 2 miles around it

Key figures

Typical depth (middle half)
200 to 339 feet
Median depth
220 feet
Deepest 10% are past
700 feet
Water level (median)
135 feet
30 wells
Yield (median)
15 gpm
29 wells, gallons per minute
Wells used
31
In the last 10 years
Inside the city limits
1
the rest within 2 miles
All years on file
52
median 240 ft, since 2003
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 135 feet below the surface (30 wells).

What is under Walnut Springs, TexasUnderground column at the center of Walnut Springs: median well 220 ft, middle half 200 to 339 ft, water at 135 ft, and the layers of the state's model with their thickness.Upper Trinity: 0 to 494 ftUpper TrinityLower Trinity: 494 to 753 ftLower TrinityBelow the base of the Trinity0200400600800ftGround level · 946 ft above sea levelMedian well: 220 ftWater standing in the well from 135 ftWater level135 ftMiddle half200–339 ftMedian well220 ft
Layers at the center of Walnut Springs 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 31 real wells.

Which formation do wells in Walnut Springs draw from?

Most draw from the upper Trinity (Paluxy and Glen Rose, 74%), and 23% draw from the lower Trinity (Twin Mountains and Travis Peak), according to the state's Northern Trinity and Woodbine model (TWDB).

13% 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)
Upper TrinityPaluxy and Glen Rose74%23200–239
Lower TrinityTwin Mountains and Travis Peak23%7630–790
Washita and Fredericksburg3%1—

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 Walnut Springs

From the state's model, at 946 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 marl0494494
Lower Trinitysandstone with shale and limestone494753260

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 Walnut Springs are getting deeper. For reference, the median was 540 feet in 2011 to 2015 (11 wells) and 270 feet in 2021 to 2025 (14 wells).

PeriodMedian depth (ft)Wells
2001–2005under 10 wells6
2006–2010under 10 wells4
2011–201554011
2016–202020014
2021–202527014
2026under 10 wells3

What a well costs in Walnut Springs

At the median depth for Walnut Springs (220 feet), a complete home well would cost roughly $8,000 to $19,500: $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 (200 to 339 feet) the range runs from $7,500 to $27,000. 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 Walnut Springs, Texas?

Home water wells in and around Walnut Springs, Texas are typically 200 to 339 feet deep (median 220 ft, 31 wells drilled in the last 10 years). One in ten goes past 700 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 Walnut Springs draw from?

Most draw from the upper Trinity (Paluxy and Glen Rose, 74%), and 23% 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 Walnut Springs?

At the median depth (220 feet), a complete well would cost roughly $8,000 to $19,500, 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 Walnut Springs?

When the wells were finished, the water stood a median 135 feet below the surface (30 wells). The level moves with drought and from one well to the next.

Do I need a permit to drill a well in Walnut Springs?

Walnut Springs is inside the Middle 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/walnut-springs-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources