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How deep are water wells in San Patricio, Texas?

Home water wells in and around San Patricio, Texas are typically 167 to 240 feet deep (median 193 ft, 53 wells drilled in the last 10 years). Estimated cost of a complete well at the median depth: $7,500 to $18,000.

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 pointSan Patricio County
What is under San Patricio, TexasUnderground column at the center of San Patricio: median well 193 ft, middle half 167 to 240 ft, water at 34 ft.No state layer model here yet0100200300ftGround levelMedian well: 193 ftWater standing in the well from 34 ftWater level34 ftMiddle half167–240 ftMedian well193 ft

Under San Patricio, San Patricio County

The well and the water are the median of 53 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around San Patricio

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: San Patricio and about 2 miles around it

Key figures

Typical depth (middle half)
167 to 240 feet
Median depth
193 feet
Deepest 10% are past
259 feet
Water level (median)
34 feet
48 wells
Yield (median)
60 gpm
32 wells, gallons per minute
Wells used
53
In the last 10 years
Inside the city limits
87
the rest within 2 miles
All years on file
152
median 188 ft, since 2003
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 34 feet below the surface (48 wells), well above the bottom: the typical well holds about 159 feet of water.

What is under San Patricio, TexasUnderground column at the center of San Patricio: median well 193 ft, middle half 167 to 240 ft, water at 34 ft.No state layer model here yet0100200300ftGround levelMedian well: 193 ftWater standing in the well from 34 ftWater level34 ftMiddle half167–240 ftMedian well193 ft
The well and the water are the median of 53 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in San Patricio draw from?

We cannot say yet for San Patricio. 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 San Patricio County

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 San Patricio are getting deeper. For reference, the median was 180 feet in 2001 to 2005 (27 wells) and 200 feet in 2021 to 2025 (24 wells).

PeriodMedian depth (ft)Wells
2001–200518027
2006–201020033
2011–201518136
2016–202019030
2021–202520024
2026under 10 wells2

What a well costs in San Patricio

At the median depth for San Patricio (193 feet), a complete home well would cost roughly $7,500 to $18,000: $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 (167 to 240 feet) the range runs from $6,500 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 San Patricio, Texas?

Home water wells in and around San Patricio, Texas are typically 167 to 240 feet deep (median 193 ft, 53 wells drilled in the last 10 years). One in ten goes past 259 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 San Patricio?

At the median depth (193 feet), a complete well would cost roughly $7,500 to $18,000, 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 San Patricio?

When the wells were finished, the water stood a median 34 feet below the surface (48 wells), well above the bottom: the typical well holds about 159 feet of water. The level moves with drought and from one well to the next.

Do I need a permit to drill a well in San Patricio?

San Patricio is inside the San Patricio 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/san-patricio-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources