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How deep are water wells in Dennis, Texas?

Home water wells in and around Dennis, Texas are typically 180 to 240 feet deep (median 200 ft, 365 wells drilled in the last 10 years). Most (79%) draw from the Trinity, which the state maps here as one undivided unit, the Antlers Formation. Another 21% end near or below the base of the Trinity. Estimated cost of a complete well at the median depth: $7,500 to $18,500.

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 pointParker County
What is under Dennis, TexasUnderground column at the center of Dennis: median well 200 ft, middle half 180 to 240 ft, water at 100 ft.No state layer model here yet0100200300ftGround levelMedian well: 200 ftWater standing in the well from 100 ftWater level100 ftMiddle half180–240 ftMedian well200 ft

Under Dennis, Parker County

The well and the water are the median of 365 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Dennis

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: Dennis and about 2 miles around it

Key figures

Typical depth (middle half)
180 to 240 feet
Median depth
200 feet
Deepest 10% are past
260 feet
Water level (median)
100 feet
138 wells
Yield (median)
15 gpm
261 wells, gallons per minute
Wells used
365
In the last 10 years
Inside the city limits
8
the rest within 2 miles
All years on file
440
median 200 ft, since 2003
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 100 feet below the surface (138 wells).

What is under Dennis, TexasUnderground column at the center of Dennis: median well 200 ft, middle half 180 to 240 ft, water at 100 ft.No state layer model here yet0100200300ftGround levelMedian well: 200 ftWater standing in the well from 100 ftWater level100 ftMiddle half180–240 ftMedian well200 ft
The well and the water are the median of 365 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Dennis draw from?

Most (79%) draw from the Trinity, which the state maps here as one undivided unit, the Antlers Formation. Another 21% end near or below the base of the Trinity.

Only 52% bottom out inside the lower Trinity (Twin Mountains and Travis Peak): the rest keep going deeper but take their water from that layer. 48% 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)
Lower TrinityTwin Mountains and Travis Peak79%281180–240
Near or below the base of the Trinity21%74180–220

For 87% 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.

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 Dennis are getting deeper. For reference, the median was 122 feet in 2006 to 2010 (24 wells) and 200 feet in 2026 (23 wells).

PeriodMedian depth (ft)Wells
2001–2005under 10 wells8
2006–201012224
2011–201512033
2016–202020096
2021–2025200256
202620023

What a well costs in Dennis

At the median depth for Dennis (200 feet), a complete home well would cost roughly $7,500 to $18,500: $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 (180 to 240 feet) the range runs from $7,000 to $21,000. 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 Dennis, Texas?

Home water wells in and around Dennis, Texas are typically 180 to 240 feet deep (median 200 ft, 365 wells drilled in the last 10 years). One in ten goes past 260 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 Dennis draw from?

Most (79%) draw from the Trinity, which the state maps here as one undivided unit, the Antlers Formation. Another 21% end near or below the base of the Trinity. This is an estimate from the state's regional model, not a survey of the lot.

How much does a water well cost in Dennis?

At the median depth (200 feet), a complete well would cost roughly $7,500 to $18,500, 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 Dennis?

When the wells were finished, the water stood a median 100 feet below the surface (138 wells). The level moves with drought and from one well to the next.

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

Dennis is inside the Upper 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 87% 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.
  • In this area, north and west of Fort Worth, the state maps the Trinity as one undivided unit, the Antlers Formation. The model cuts it into layers by depth; the split between upper and lower Trinity shown here is approximate, and the depth ranges are the solid part.
  • "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/dennis-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources