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How deep are water wells in Seguin, Texas?

Home water wells in and around Seguin, Texas vary a lot in depth: the middle half are 46 to 240 feet deep (median 62 ft, 245 wells drilled in the last 10 years), so look at the wells closest to the tract. Estimated cost of a complete well at the median depth: $4,000 to $10,000.

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 pointGuadalupe County
What is under Seguin, TexasUnderground column at the center of Seguin: median well 62 ft, middle half 46 to 240 ft, water at 35 ft.No state layer model here yet0100200300400ftGround levelMedian well: 62 ftWater standing in the well from 35 ftWater level35 ftMedian well62 ftMiddle half46–240 ft

Under Seguin, Guadalupe County

The well and the water are the median of 245 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Seguin

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: Seguin and about 2 miles around it

Key figures

Typical depth (middle half)
46 to 240 feet
Median depth
62 feet
Deepest 10% are past
321 feet
Water level (median)
35 feet
222 wells
Yield (median)
20 gpm
228 wells, gallons per minute
Wells used
245
In the last 10 years
Inside the city limits
96
the rest within 2 miles
All years on file
599
median 62 ft, since 2002
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 35 feet below the surface (222 wells).

What is under Seguin, TexasUnderground column at the center of Seguin: median well 62 ft, middle half 46 to 240 ft, water at 35 ft.No state layer model here yet0100200300400ftGround levelMedian well: 62 ftWater standing in the well from 35 ftWater level35 ftMedian well62 ftMiddle half46–240 ft
The well and the water are the median of 245 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Seguin draw from?

We cannot say yet for Seguin. This atlas assigns layers with the TWDB layered models processed so far (the Northern Trinity and Woodbine model, the Hill Country Trinity model, the northern Gulf Coast Aquifer model and the High Plains Aquifer System model), and none covers this area with enough wells. The depth, water level and yield on this page do come from the real wells here.

See the aquifers mapped under Guadalupe County

Depth over time

Home well depth in and around Seguin has not changed meaningfully in 20 years: the median was 111 feet in 2003 to 2007 and 58 feet in 2021 to 2025 (a difference under 10% or within the margin of error).

PeriodMedian depth (ft)Wells
2001–200514594
2006–201060133
2011–201557110
2016–2020140101
2021–202558148
202619713

What a well costs in Seguin

At the median depth for Seguin (62 feet), a complete home well would cost roughly $4,000 to $10,000: $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 (46 to 240 feet) the range runs from $3,500 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 Seguin, Texas?

Home water wells in and around Seguin, Texas vary a lot in depth: the middle half are 46 to 240 feet deep (median 62 ft, 245 wells drilled in the last 10 years), so look at the wells closest to the tract. One in ten goes past 321 feet. The depth a given tract needs depends on where it sits and what layers the driller hits.

How much does a water well cost in Seguin?

At the median depth (62 feet), a complete well would cost roughly $4,000 to $10,000, 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 Seguin?

When the wells were finished, the water stood a median 35 feet below the surface (222 wells). The level moves with drought and from one well to the next.

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

Seguin is inside the Guadalupe County 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.

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/seguin-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources