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Water wells in younger formations above the Woodbine, Travis County, Texas

Home water wells completed in younger formations above the Woodbine in Travis County, Texas vary a lot in depth: the middle half are 51 to 120 feet deep (median 65 ft, 62 wells reported since 2001), so look at the wells closest to the tract. It is a minor layer here: just 1% of the 916 wells the state's model covers; the main one is the Lower Trinity (46%). They run about 380 feet shallower than the county's median well (445 ft). Estimated cost of a complete well at the median depth: $4,000 to $10,500.

Updated every day from Texas Water Development Board driller reports. Last update: November 11, 2026, using the state file of November 10, 2026.

All wells in Travis CountyAbove the Woodbine across Texas

Which layer Travis County wells draw from

Under Austin, Travis County

County home wells covered by the Northern Trinity and Woodbine model (in the last 10 years).

Home wells in Travis County

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+

Dark line: Travis County

Key figures

Typical depth (middle half)
51 to 120 feet
Median depth
65 feet
Deepest 10% are past
425 feet
Water level (median)
34 feet
40 wells
Yield (median)
30 gpm
46 wells, gallons per minute
Wells used
62
Since 2001
Share of the county's wells
1%
All years on file
62
median 65 ft, since 2001
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 34 feet below the surface (40 wells).

Which layer Travis County wells draw from

County home wells covered by the Northern Trinity and Woodbine model (in the last 10 years).

What this layer is

The state's Northern Trinity and Woodbine model treats everything above the Woodbine as a single layer: the Eagle Ford, Austin, Taylor and Navarro groups (mostly shale, chalk and marl) plus younger sands and river deposits where they exist. It is a catch-all, not one rock. In counties east and south of the Trinity outcrop, a home well in this layer is usually drawing from a younger local sand that this model does not separate.

More about younger formations above the Woodbine

Depth over time

Too few wells per period in this layer in Travis County to compare depth over time. Since 2001, 62 home wells have been reported, with a median of 65 feet.

PeriodMedian depth (ft)Wells
2001–2005under 10 wells6
2006–20106132
2011–2015under 10 wells8
2016–2020under 10 wells8
2021–2025under 10 wells7
2026under 10 wells1

Places in Travis County with wells in this layer

Common questions

How deep is a well in younger formations above the Woodbine in Travis County?

Home water wells completed in younger formations above the Woodbine in Travis County, Texas vary a lot in depth: the middle half are 51 to 120 feet deep (median 65 ft, 62 wells reported since 2001), so look at the wells closest to the tract.

How many Travis County wells draw from this layer?

It is a minor layer here: just 1% of the 916 wells the state's model covers; the main one is the Lower Trinity (46%). Only 19% 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 deep does the water stand?

When the wells were finished, the water stood a median 34 feet below the surface (40 wells).

What a well costs here

At the median depth for this layer in Travis County (65 feet), a complete home well would cost roughly $4,000 to $10,500: $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 (51 to 120 feet) the range runs from $4,000 to $13,500. 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.

How these numbers are made

We count new and replacement domestic (home) wells with a valid depth on their report. 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 19% 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/travis-county/younger-formations. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources