Aquifer Beaker

Edwards Aquifer

Aquifer Level 671.5'
5/25/17 - Official

The Edwards aquifer and its catchment area in the San Antonio region is about 8,000 square miles and includes all or part of 13 counties in south-central Texas.

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Year-Round Watering Hours

Watering with an irrigation system or sprinkler is allowed any day of the week before 11 a.m. or after 7 p.m.

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Aquifer Level 671.5 | Year-Round Watering Hours

eBill Site Maintenance

4 - 6:00 a.m.

The SAWS eBill site will be unavailable from 4 - 6:00 a.m. due to site maintenance. We apologize for the inconvenience. Please check back soon!


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Expanded Local Carrizo

Medina Lake

Through an agreement with the Bexar-Medina-Atascosa Water Control & Improvement District No. 1, the Medina project was established as San Antonio's first modern surface water project in 2000. With access to 19,974 acre-feet per year, water stored in Medina Lake is delivered to SAWS' ultra-filtration membrane plant located on the Medina River in southwest Bexar County.

San Antonio Water System owns and leases run-of-river surface water rights on the Medina River in the amount of 9,214 acre-feet per year. Presently, the facility has treatment capacity of up to 13,000 acre-feet per year.

In Times of Drought

However during extreme droughts, firm-yields may limit the size of the contributing watershed to zero acre-feet per year, which is consistent with the South-Central Texas Regional Water Planning Group and the Texas Water Development Board State Water Plan.

* An acre-foot of water is equivalent to 325,851 gallons.