SAWS:Groundwater Resource Protection
Aquifer Beaker

Edwards Aquifer

Aquifer Level 657.8'
9/19/17 - 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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Landscape Watering
Last Digit of Address Watering Day
0 or 1 Monday
2 or 3 Tuesday
4 or 5 Wednesday
6 or 7 Thursday
8 or 9 Friday
No Watering on Weekends

Stage 1:
Water once a week

Watering with an irrigation system or sprinkler is allowed only once a week before 11 a.m. or after 7 p.m. on your designated watering day as determined by your address.

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Aquifer Level 657.8 | Stage 1: Water once a week


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Water Quality

Water Quality Concerns

SAWS has a long-term commitment to providing our customers with excellent drinking water, which has been proven through the years. Historically, SAWS and its predecessors have been rated as a superior water system since 1936. Your confidence in San Antonio's water supply is important to us at SAWS. We are committed to providing reliable, quality water.

Public water systems, such as San Antonio Water System, are required by law to report every year on the type and quantity of substances that are in our water. This law – the Safe Drinking Water Act, amended by Congress in 1996 – has specific guidelines concerning drinking water quality, as well as methods of testing and frequency of testing. The Environmental Protection Agency (EPA) with assistance locally from the Texas Commission on Environmental Quality administers the Safe Drinking Water Act to make sure tap water is safe to drink by restricting the presence of contaminants in public water systems.

Report a water quality concern any time by calling 210-704-SAWS (7297). For general questions or information about water quality, please call 210-233-3546.