The City of San Marcos Water Quality Department monitors drinking water and wastewater in the City of San Marcos' distribution and collection lines in accordance with local, state, and federal rules. This department is dedicated to ensuring that the citizens of San Marcos and visitors to the area have access to safe drinking water and clean water for recreation.
The Water Quality department can also be contacted at (512) 393-8010, or Industrial Pretreatment.
Water Quality Reports and Documents
The City posts its annual water quality reports here in accordance with TCEQ regulations. Click on the links below to access water quality reports and other helpful documents.
Current Water Quality Report
Past Water Quality Reports
Unregulated Contaminant Monitoring Rule 4