The San Antonio River Authority’s Environmental Sciences Department, along with its partners, conduct water quality monitoring, biological community and habitat assessments throughout the San Antonio River Basin. This data is submitted to the Texas Commission on Environmental Quality (TCEQ), and is used to assess whether streams are meeting their designated use(s). The SARA Regional Environmental Laboratory, a TCEQ Accredited Laboratory, conducts analysis of the surface water samples. Biological and Habitat Assessments are completed by the Watershed Monitoring Aquatic Biologists. The data can be viewed and downloaded through a Geographic Information System (GIS) application. To view and download data please follow the link.