How deep are water wells in Lamar County, Texas?

Only 23 home water wells have been reported in Lamar County since 2001, so this is a rough guide: the middle half are 82 to 183 feet deep, with a median of 100 feet. Drillers measured the water standing a median 26 feet below the surface (14 wells).

Updated every day from Texas Water Development Board driller reports. Last update: November 10, 2026, using the state file of November 9, 2026. 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.

Key figures

Typical depth (middle half)
82 to 183 ft
Median depth
100 feet
Deepest 10% are past
237 feet
Water level (median)
26 feet (14 wells)
Yield (median)
13 gallons per minute (70% pump-tested)
Wells used
23
Period
Since 2001
Latest report
August 14, 2024
Confidence
Few wells

How deep the wells are

Number of home wells by depth, last 10 years (or since 2001 where wells are few).

Depth (ft)Wells
0 to 503
50 to 1006
100 to 1505
150 to 2004
200 to 2504
250 to 3001

Are wells in Lamar County getting deeper?

Lamar County does not have enough domestic wells in both 2003 to 2007 and 2021 to 2025 (at least 30 in each) to compare. Read the 20-year study.

Aquifers under the county

The Texas Water Development Board maps the Trinity, a major aquifer, below other rock (subsurface) across 93% of the county; the Woodbine, a minor aquifer, under 57% of the county; the Blossom, a minor aquifer, under 7% of the county.

What a well costs in Lamar County

At the median depth for Lamar County (100 feet), a complete home well (drilling, casing, pump, pressure tank and hookup at the well) would cost roughly $5,000 to $12,500, by TerraFunded's estimate from published Texas prices. Trenching and the line to the house are extra. Get quotes from at least two licensed drillers.

Neighboring counties

Common questions

How deep do I need to drill a well in Lamar County?

The middle half of home wells drilled there are 82 to 183 feet deep; one in ten goes past 237 feet. The depth a given tract needs depends on where it is and what layers the driller hits.

How much does a water well cost in Lamar County?

At the median depth (100 feet), a complete well would cost roughly $5,000 to $12,500 by TerraFunded's estimate from published Texas driller prices ($25 to $60 per foot plus pump and equipment). The real price comes from a driller's quote.

How much water does a well produce in Lamar County?

Drillers reported a median of 13 gallons per minute (20 wells). Only 70% of those figures come from a pump test; the rest are the driller's estimate, so treat them as a guide.

Are wells in Lamar County getting deeper?

Lamar County does not have enough domestic wells in both 2003 to 2007 and 2021 to 2025 (at least 30 in each) to compare.

How do I see the well report for a property or a neighbor's well?

Every well drilled in Texas since 2001 has a public driller's report. On this page's map, tap a well to open its official report on the state's site, or look it up by location in the TWDB viewer.

How to read these numbers

Figures cover new and replacement domestic (home) wells, from the reports licensed drillers file with the state. Read the full methodology. Download the county table (CSV).

How to cite: TerraFunded Texas Well Atlas, from Texas Water Development Board driller reports (data as of November 9, 2026). https://terrafunded.com/wells

Sources

Land for sale in Lamar County

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