MSDs prohibit the use of impaired shallow groundwater as potable water. In the City's ordinance, potable water is defined as, water that is used for irrigation, production of food or drink products intended for human consumption, drinking, showering, bathing or cooking purposes. An MSD does not remove any liability from the property owner, nor does it shift any liability to the City.
In 2003, the Texas Legislature authorized the creation of MSDs, which would designate an area in which the use of contaminated groundwater is prohibited from use as potable water. The law is administered by TCEQ. The intent of the legislation is to encourage redevelopment of vacant or abandoned properties while protecting the public health.
On April 07, 2016, City Council approved an ordinance which provides a process for supporting or not supporting a Municipal Setting Designation (MSD) application to the State.
General MSD Site Eligibility
- The plume is stable (i.e. no change) or decreasing in concentration
- The plume is delineated to the Protective Concentration
Levels (PCLs) for groundwater ingestion pathway (
- The site has been enrolled in a state or federal cleanup program
- The site has been thoroughly investigated with sufficient data
- The source of contamination has been removed
- No MSD will be granted to a project within ½ mile of a San Antonio Water System (SAWS) primary pump station. The SAWS primary pump station consists of all equipment located within the property boundary.
Interactive MSD Mapping Site
MSD Site Status Map - Coming Soon
MSD Site Status - Coming Soon
CoSA MSD Ordinance (PDF)
CoSA MSD Policy and Guidelines (PDF)
A Guide for Cities (PDF)
Frequently Asked Questions (PDF)
CoSA MSD Boundary Map (PDF)
MSD Site Shape Files - Coming Soon
CoSA MSD Boundary gdb down-loadable file (ZIP)
For more information concerning the application or process
Robert P. Espinosa
TCI Department - Environmental Management Division
Ph. (210) 207-1448