Evidence behind the context
Public sources, used with clear limits.
These resources inform regional education. They do not establish the conditions beneath a particular home or replace an on-site inspection.
- U.S. Geological SurveyGeology of the Edwards Aquifer
Regional context for limestone, dolomite, and the Balcones fault zone.
Read Geology of the Edwards Aquifer at U.S. Geological Survey ↗ - U.S. Geological SurveyGeologic framework and hydrogeologic characteristics of the Edwards Aquifer
Background on the geologic framework in Bexar County.
Read Geologic framework and hydrogeologic characteristics of the Edwards Aquifer at U.S. Geological Survey ↗ - USDA Natural Resources Conservation ServiceWeb Soil Survey
The official current source for mapped soil survey information.
Read Web Soil Survey at USDA Natural Resources Conservation Service ↗ - Texas A&M AgriLife ExtensionSoil Management
General Texas soil characteristics and responsible soil-management guidance.
Read Soil Management at Texas A&M AgriLife Extension ↗ - Texas Water Development BoardHomebuyer’s Guide to Groundwater and Foundation Conditions
Texas public guidance concerning soil, groundwater, and foundation observations.
Read Homebuyer’s Guide to Groundwater and Foundation Conditions at Texas Water Development Board ↗
Editorial note
Local page copy distinguishes regional context from property-specific findings. We avoid presenting generalized soil, rock, drainage, or climate observations as proof of a structural condition. Pages should be reviewed when public sources or service-area facts materially change.
How to use these sources
These links are original public references for geology, soil, groundwater, and regional context. They can help you ask better questions, but they cannot diagnose an individual home. For the practical next step, compare theinspection scope, review the warning signs, or read the San Antonio service guide.