Carrizo Aquifer

Project to Help With Water Supply Diversification

A cooperative regional partnership has helped to secure SAWS’ largest non-Edwards Aquifer water supply to date. Approval of permits by the Gonzales County Underground Water Conservation District will allow SAWS to produce and transport up to 11,688 acre-feet* of Carrizo Aquifer groundwater from Gonzales County to San Antonio. This project became operational in 2013.

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Project Profile

The Regional Carrizo project is located approximately 50 miles east of San Antonio and includes delivery of water from western Gonzales County.

Up to 13 million gallons per day (mgd) of water produced from this well field is transported by pipeline to an integration point in northeast San Antonio where it enters the SAWS distribution system.

Instead of building a new pipeline, SAWS is “renting” available capacity in an existing pipeline owned and operated by Schertz-Seguin Local Government Corporation(SSLGC), saving San Antonio ratepayers $88 million in infrastructure costs.

Surplus water from SSLGC began flowing through the pipelines in December 2013, while limited production from SAWS’ own well field started in March 2014.

This project cost $149 million and provides water for approximately 60,000 households.

Project Benefits

  • The Regional Carrizo project will assist in diversifying. San Antonio’s water supply, reducing dependence on existing Edwards Aquifer supplies.
  • The project will provide water to help meet San Antonio’s short- and mid-term water needs.
  • Up to 5,550 acre-feet* of additional supply could be added to the total project through purchase agreements with other utilities, for a total supply to San Antonio of up to 17,237 acre-feet* per year.