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How deep are water wells in Selma, Texas?

Only 19 home water wells in and around Selma, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 260 to 378 feet deep (median 320 ft). Estimated cost of a complete well at the median depth: $10,500 to $25,500.

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.

See the wells and layers at an exact pointBexar County
What is under Selma, TexasUnderground column at the center of Selma: median well 320 ft, middle half 260 to 378 ft, water at 146 ft.No state layer model here yet0200400600ftGround levelMedian well: 320 ftWater standing in the well from 146 ftWater level146 ftMiddle half260–378 ftMedian well320 ft

Under Selma, Bexar County

The well and the water are the median of 19 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Selma

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: Selma and about 2 miles around it

Key figures

Typical depth (middle half)
260 to 378 feet
Median depth
320 feet
Deepest 10% are past
500 feet
Water level (median)
146 feet
19 wells
Yield (median)
15 gpm
16 wells, gallons per minute
Wells used
19
Since 2001
Inside the city limits
1
the rest within 2 miles
All years on file
19
median 320 ft, since 2003
Confidence
Few wells (10 to 29)

When the wells were finished, the water stood a median 146 feet below the surface (19 wells).

What is under Selma, TexasUnderground column at the center of Selma: median well 320 ft, middle half 260 to 378 ft, water at 146 ft.No state layer model here yet0200400600ftGround levelMedian well: 320 ftWater standing in the well from 146 ftWater level146 ftMiddle half260–378 ftMedian well320 ft
The well and the water are the median of 19 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Selma draw from?

We cannot say yet for Selma. 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 Bexar County

Depth over time

Too few wells per period in and around Selma to compare depth over time. Since 2003, 19 home wells have been reported, with a median of 320 feet.

PeriodMedian depth (ft)Wells
2001–2005under 10 wells4
2006–2010under 10 wells5
2011–2015under 10 wells2
2016–2020under 10 wells5
2021–2025under 10 wells2
2026under 10 wells1

What a well costs in Selma

At the median depth for Selma (320 feet), a complete home well would cost roughly $10,500 to $25,500: $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 (260 to 378 feet) the range runs from $9,000 to $29,000. 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 Selma, Texas?

Only 19 home water wells in and around Selma, Texas have been reported since 2001, so treat this as a rough guide: the middle half are 260 to 378 feet deep (median 320 ft). One in ten goes past 500 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 Selma?

At the median depth (320 feet), a complete well would cost roughly $10,500 to $25,500, 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 Selma?

When the wells were finished, the water stood a median 146 feet below the surface (19 wells). The level moves with drought and from one well to the next.

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

Selma is inside the Edwards Aquifer Authority. 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/selma-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources