7 Sources, 13 Projects
San Antonio Water System has developed a diversified water portfolio to ensure a sustainable, reliable supply for our community — even during times of severe drought.
In 1995, 100 percent of San Antonio’s water came from the Edwards Aquifer. Today, SAWS manages 13 supply projects originating from seven different sources, assuring a secure water future for our growing community.
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Benefits of Water Supply Diversification
- Reduces the adverse effects of drought on San Antonio and our region.
- Decreases reliance on the Edwards Aquifer to 60 percent of total supply.
- Improves spring flows and habitat for threatened and endangered species.
- Increases resilience in managing any climate-related impacts to one or more water sources.
- Provides SAWS customers water security today and for generations to come.
Water Management Plan & Semiannual Report
The semiannual water management reports documents the water resources activities pertaining to the implementation of San Antonio Water System’s long-term planning efforts established in the Water Management Plan.
The updated plan addresses the city’s future needs by calling for investment in new supplies and a continued commitment to water conservation.
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Water Sources
Edwards Aquifer
The Edwards Aquifer is a massive underground reservoir and the source for over half of San Antonio’s drinking water.
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Trinity Aquifer
Introduced in 2002, the Trinity Aquifer was the first non-Edwards Aquifer drinking water to pass through SAWS pipelines.
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Carrizo Aquifer
The Carrizo Aquifer is a vast aquifer that stretches from the Rio Grande in South Texas to parts of Arkansas and Louisiana.
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Simsboro Aquifer
Water from the Simsboro aquifer makes up 70 percent of the water produced for the Vista Ridge Pipeline, the largest non-Edwards Aquifer supply in our city’s history.
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Wilcox Aquifer
SAWS’ desal plant treats salty water from 1,500 feet underground in the Wilcox Aquifer, producing 10 million gallons per day of drinking water.
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Canyon Lake
SAWS’ second surface water project gushed to life in April 2006, delivering purified Canyon Lake water to customers in northwest San Antonio.
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The recycled water produced from the SAWS Water Recycling Centers has proven important to SAWS’ diversification and conservation efforts.
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Water Supply Projects
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Schertz-Seguin Local Government Corporation
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2023 Distribution Report
In 2023, San Antonio Water System (SAWS) distributed a total potable water volume of 280,239 acre-feet (AF). This does not include the 5,622 AF of Edwards Aquifer water that was stored in the H2Oaks Aquifer Storage & Recovery facility. In addition, 50,791 AF of recycled water was supplied to our customers; 32,673 AF to CPS Energy and 18,118 AF to the remaining customers. The total water demand was supplied by the following sources:
