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.
Open the official source ↗ - U.S. Geological SurveyGeologic framework and hydrogeologic characteristics of the Edwards Aquifer
Background on the geologic framework in Bexar County.
Open the official source ↗ - USDA Natural Resources Conservation ServiceWeb Soil Survey
The official current source for mapped soil survey information.
Open the official source ↗ - Texas A&M AgriLife ExtensionSoil Management
General Texas soil characteristics and responsible soil-management guidance.
Open the official source ↗ - Texas Water Development BoardHomebuyer’s Guide to Groundwater and Foundation Conditions
Texas public guidance concerning soil, groundwater, and foundation observations.
Open the official source ↗
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.