The Public Works Department is responsible for maintaining our City’s storm water infrastructure and engineering improvement projects to help reduce flooding during rain events. We also review residential and commercial storm water development plans to ensure future construction projects and private development do not adversely impact current drainage systems. Lastly, we are also responsible for overseeing the federal and state Municipal Separate Storm Sewer System (MS4) permit.
311 City Services & Info
To submit a storm water related service request, please call 311 (210.207.6000) or make a report online.
National Flood Insurance Program (NFIP)
Federally regulated insurance program which allows the City to enforce floodplain management standards and allows property owners and renters to purchase flood insurance
For more information on how to obtain an Elevation Certificate for your property address, please call 210.206.8433.
Unified Development Code (UDC) Definitions
Appendix A of the UDC lists definitions and rules of interpretation
Bexar Regional Watershed Management (BRWM)
For information on the Bexar Regional Watershed Management (BRWM) partnership between the Bexar County Commissioners Court, The City of San Antonio and the San Antonio River Authority (SARA), visit the BRWM website
Bexar County Flood Information
Bexar County provides current flood information and emergency road closures that can be found here
US Geological Survey (USGS)
The USGS provides stream gage data at the USGS website. To search gage information on the website, click a colored dot on the map and click the grey “More Data” button. There, the Gage Height (height of water above a reference point), Discharge (volume of water flowing past a given point in the stream), and precipitation values can be viewed.
San Antonio Flood Emergency (SAFE)
For more information on flood facts, flood insurance, flood preparedness and flood resources, visit the SA Flood Safe website.
What To Do If Caught In A Flash Flood
Whether walking or driving, find some steps you should take if you are caught in a flash flood. Visit the San Antonio Fire Department website.
The following GIS maps are also available.