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

Only 14 home water wells completed in younger formations above the Woodbine in Hill County, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 268 to 495 feet deep (median 402 ft). It is a minor layer here: just 3% of the 357 wells the state's model covers; the main one is the Woodbine Aquifer (48%). They run about 42 feet deeper than the county's median well (360 ft). Estimated cost of a complete well at the median depth: $12,500 to $30,500.

This page is based on fewer than 30 wells, so it is kept out of search engines until more reports come in. Treat every figure as a rough guide.

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 Hill CountyAbove the Woodbine across Texas

Which layer Hill County wells draw from

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

Home wells in Hill 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: Hill County

Key figures

Typical depth (middle half)
268 to 495 feet
Median depth
402 feet
Deepest 10% are past
623 feet
Water level (median)
225 feet
12 wells
Wells used
14
Since 2001
Share of the county's wells
3%
All years on file
14
median 402 ft, since 2004
Confidence
Few wells (10 to 29)

When the wells were finished, the water stood a median 225 feet below the surface (12 wells).

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 Hill County to compare depth over time. Since 2004, 14 home wells have been reported, with a median of 402 feet.

PeriodMedian depth (ft)Wells
2001–2005under 10 wells1
2006–2010under 10 wells2
2011–2015under 10 wells1
2016–2020under 10 wells4
2021–2025under 10 wells6

Common questions

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

Only 14 home water wells completed in younger formations above the Woodbine in Hill County, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 268 to 495 feet deep (median 402 ft).

How many Hill County wells draw from this layer?

It is a minor layer here: just 3% of the 357 wells the state's model covers; the main one is the Woodbine Aquifer (48%). For 71% 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 deep does the water stand?

When the wells were finished, the water stood a median 225 feet below the surface (12 wells).

What a well costs here

At the median depth for this layer in Hill County (402 feet), a complete home well would cost roughly $12,500 to $30,500: $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 (268 to 495 feet) the range runs from $9,000 to $36,000. 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.

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.

For 71% 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/hill-county/younger-formations. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources