The TCEQ Well Report Database
The Texas Commission on Environmental Quality (TCEQ) requires licensed water well drillers to file a Well Report (also called a driller's log or completion report) with the state within 30 days of completing a water well. These reports are public record and are searchable through the TCEQ's online Water Well Report database at tceq.texas.gov.
The database can be searched by county, survey, abstract number, or coordinates. For a property you are evaluating, searching by the county and approximate location will typically surface any documented wells on or near the parcel. The resulting report will show:
- Total depth — how deep the well was drilled
- Static water level — the depth at which water naturally stands in the well without pumping
- Yield — the driller's estimate of water production in gallons per minute
- Formation — what geologic formation was penetrated to find water
- Casing — diameter and material of the well casing
- Driller information — the licensed driller who completed the well
Limitations of the Database
The TCEQ database covers wells drilled since 1985, when reporting became mandatory. Older wells — and there are many operating wells in Blanco County that predate 1985 — may have no public record at all. For these wells, options include:
- Requesting any well records the seller has on file (pump test results, water quality reports, maintenance records)
- Contacting the Headwaters Groundwater Conservation District, which serves Blanco County and may have additional records
- Contacting licensed drillers in the area who may have records of older wells they drilled or serviced
- Commissioning a new pump test during the inspection period to get current yield data
What to Do When No Log Is Available
Many rural properties in Blanco County have older wells with no formal documentation. This is common and not automatically a red flag, but it does mean you need to generate your own data before closing. The standard approach is to contract with a licensed water well driller or pump service company to conduct a pump test — typically a 4-hour step drawdown test that measures actual yield under pumping conditions.
A pump test costs $300–$700 depending on the contractor and test duration, and is almost always worth the investment on a property where water is the primary source. It gives you real numbers, not estimates from a 30-year-old log. Combined with a water quality analysis from a certified lab ($100–$300), you have a complete picture of the well's current condition before you close.
The Texas Water Development Board Aquifer Viewer
Even before you have a specific well log, the Texas Water Development Board (TWDB) maintains an interactive Aquifer Viewer that maps groundwater formations and known water table depths across the state. For Blanco County, the viewer shows the extent of the Trinity Aquifer formations — the primary groundwater source in the area — and can help you understand what kind of well infrastructure is typical for a given location.
