Aquifer Beaker

Edwards Aquifer

Aquifer Level 646.0'
9/1/15 - 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 2:
Water On Your Day

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

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Aquifer Level 646.0 | Stage 2: Water On Your Day


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Rates - Wholesale Water and Sewer Rates

Residential Rate Calculator

The Residential Rate Calculator can be used to help you estimate your monthly residential SAWS bill, based on projected water use and other criteria.

     Rate Type
     Meter Size
     Lot Size in
  Square Feet
  Water Volume
     Average Winter
Water and Sewer   
Water Only   
Sewer Only   
  Service Type
Affordability Discount Eligibility
     Family Size
$     Annual Income

This calculator can be used to help you get an idea of how new rates approved by SAWS Board of Trustees and San Antonio City Council, will affect your monthly residential water bill. The new rates are effective Jan. 1, 2015.

When you use the calculator, it may be helpful to have a copy of a recent SAWS bill handy.

Just key in the information requested and click the "calculate" button.

SAWS rates remain among the lowest in Texas, part of our ongoing commitment to provide sustainable, affordable water services.

To learn more about how SAWS determined the new rates, click here.

For more information you can view our complete 2014 and 2015 rate schedules.

Note: This online calculator is for estimating purposes only. Your actual bill may vary slightly due to mathematical rounding. If you have specific questions about your bill, you can e-mail SAWS Customer Service at