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How deep are water wells in Savannah, Texas?

Only 11 home water wells in and around Savannah, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 340 to 448 feet deep (median 340 ft). No single layer dominates: 46% are completed in the Woodbine Aquifer and 36% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), according to the state's Northern Trinity and Woodbine model (TWDB). Estimated cost of a complete well at the median depth: $11,000 to $27,000.

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.

See the wells and layers at an exact pointDenton County
What is under Savannah, TexasUnderground column at the center of Savannah: median well 340 ft, middle half 340 to 448 ft, and the layers of the state's model with their thickness.Above the Woodbine: 0 to 51 ftWoodbine: 51 to 435 ftWoodbineWashita and Fredericksburg: 435 to 952 ftWashita and Frederick…Upper Trinity: 952 to 1,568 ftUpper Trinitycontinues to 2,051 ft02505007501,0001,250ftGround level · 578 ft above sea levelMedian well: 340 ftMiddle half340–448 ftMedian well340 ft

Under Savannah, Denton County

Layers at the center of Savannah 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 11 real wells.

Home wells in and around Savannah

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: Savannah and about 2 miles around it

Key figures

Typical depth (middle half)
340 to 448 feet
Median depth
340 feet
Deepest 10% are past
985 feet
Wells used
11
Since 2001
Inside the city limits
0
the rest within 2 miles
All years on file
11
median 340 ft, since 2002
Confidence
Few wells (10 to 29)
What is under Savannah, TexasUnderground column at the center of Savannah: median well 340 ft, middle half 340 to 448 ft, and the layers of the state's model with their thickness.Above the Woodbine: 0 to 51 ftWoodbine: 51 to 435 ftWoodbineWashita and Fredericksburg: 435 to 952 ftWashita and Frederick…Upper Trinity: 952 to 1,568 ftUpper Trinitycontinues to 2,051 ft02505007501,0001,250ftGround level · 578 ft above sea levelMedian well: 340 ftMiddle half340–448 ftMedian well340 ft
Layers at the center of Savannah 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 11 real wells.

Which formation do wells in Savannah draw from?

No single layer dominates: 46% are completed in the Woodbine Aquifer and 36% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), according to the state's Northern Trinity and Woodbine model (TWDB).

Layer (state's model)ShareWellsTypical depth (ft)
Woodbine46%5260–435
At or just below the base of the WoodbineWashita and Fredericksburg36%4—
Upper TrinityPaluxy and Glen Rose9%1—
Near or below the base of the Trinity9%1—

Only 9% 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.

The layers under the center of Savannah

From the state's model, at 578 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)
Above the Woodbineshale, chalk and marl05151
Woodbinesandstone with shale51435383
Washita and Fredericksburglimestone, marl and clay435952517
Upper Trinitysandstone, limestone and marl9521,568616
Lower Trinitysandstone with shale and limestone1,5682,051483

Depth over time

Too few wells per period in and around Savannah to compare depth over time. Since 2002, 11 home wells have been reported, with a median of 340 feet.

PeriodMedian depth (ft)Wells
2001–2005under 10 wells3
2006–2010under 10 wells6
2011–2015under 10 wells1
2016–2020under 10 wells1

What a well costs in Savannah

At the median depth for Savannah (340 feet), a complete home well would cost roughly $11,000 to $27,000: $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 (340 to 448 feet) the range runs from $11,000 to $33,500. 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 Savannah, Texas?

Only 11 home water wells in and around Savannah, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 340 to 448 feet deep (median 340 ft). One in ten goes past 985 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 Savannah draw from?

No single layer dominates: 46% are completed in the Woodbine Aquifer and 36% end at or just below the base of the Woodbine (Washita and Fredericksburg groups), 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 Savannah?

At the median depth (340 feet), a complete well would cost roughly $11,000 to $27,000, by TerraFunded's estimate from published Texas driller prices. The real price comes from a licensed driller's quote.

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

Savannah is inside the North Texas 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.

Only 9% 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/places/savannah-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources