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How deep are water wells in Helotes, Texas?

Home water wells in and around Helotes, Texas are typically 445 to 690 feet deep (median 505 ft, 30 wells drilled in the last 10 years). The state's model covers only 43% of these wells (13); among those, 69% draw from the Upper Trinity, and 31% draw from the Middle Trinity, according to the state's Hill Country Trinity model (TWDB). Estimated cost of a complete well at the median depth: $15,000 to $37,000.

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 pointBexar County
What is under Helotes, TexasUnderground column at the center of Helotes: median well 505 ft, middle half 445 to 690 ft, water at 297 ft.No state layer model here yet02004006008001,000ftGround levelMedian well: 505 ftWater standing in the well from 297 ftWater level297 ftMiddle half445–690 ftMedian well505 ft

Under Helotes, Bexar County

The well and the water are the median of 30 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Helotes

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: Helotes and about 2 miles around it

Key figures

Typical depth (middle half)
445 to 690 feet
Median depth
505 feet
Deepest 10% are past
897 feet
Water level (median)
297 feet
23 wells
Yield (median)
30 gpm
20 wells, gallons per minute
Wells used
30
In the last 10 years
Inside the city limits
61
the rest within 2 miles
All years on file
125
median 500 ft, since 1996
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 297 feet below the surface (23 wells).

What is under Helotes, TexasUnderground column at the center of Helotes: median well 505 ft, middle half 445 to 690 ft, water at 297 ft.No state layer model here yet02004006008001,000ftGround levelMedian well: 505 ftWater standing in the well from 297 ftWater level297 ftMiddle half445–690 ftMedian well505 ft
The well and the water are the median of 30 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Helotes draw from?

The state's model covers only 43% of these wells (13); among those, 69% draw from the Upper Trinity, and 31% draw from the Middle Trinity, according to the state's Hill Country Trinity model (TWDB).

Only 54% bottom out inside the Upper Trinity: the rest keep going deeper but take their water from that layer.

Layer (state's model)ShareWellsTypical depth (ft)
Upper Trinity69%9300–897
Middle Trinity31%4—

For 85% 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 Helotes are getting deeper. For reference, the median was 400 feet in 2001 to 2005 (23 wells) and 505 feet in 2021 to 2025 (20 wells).

PeriodMedian depth (ft)Wells
2001–200540023
2006–201065030
2011–201550035
2016–202050015
2021–202550520

What a well costs in Helotes

At the median depth for Helotes (505 feet), a complete home well would cost roughly $15,000 to $37,000: $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 (445 to 690 feet) the range runs from $13,500 to $48,000. 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 Helotes, Texas?

Home water wells in and around Helotes, Texas are typically 445 to 690 feet deep (median 505 ft, 30 wells drilled in the last 10 years). One in ten goes past 897 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 Helotes draw from?

The state's model covers only 43% of these wells (13); among those, 69% draw from the Upper Trinity, and 31% draw from the Middle Trinity, according to the state's Hill Country Trinity 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 Helotes?

At the median depth (505 feet), a complete well would cost roughly $15,000 to $37,000, 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 Helotes?

When the wells were finished, the water stood a median 297 feet below the surface (23 wells). The level moves with drought and from one well to the next.

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

Helotes 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.

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 85% 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 2,665 wells in the Texas Hill Country 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 76% of them, and that layer or the one next to it in at least 98%.

  • The layers come from the Texas Water Development Board's Hill Country Trinity model, with 1 mile cells. 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.
  • "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/helotes-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources