Aquifer Beaker

Edwards Aquifer

Aquifer Level 664.2'
11/29/15 - 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 664.2 | 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.

Calculate My Bill
     Rate Type
     Meter Size
     Lot Size in
  Square Feet *
     Impervious Cover
  in Square Feet *
  Water Volume
     Average Winter
Water and Sewer   
Water Only   
Sewer Only   
  Service Type
Affordability Discount Eligibility
     Family Size
$     Annual Income
* On September 10, 2015 San Antonio City Council adopted a new billing structure for the stormwater utility fee using an impervious cover approach which will change the fees in 2016. For more information on how the City of San Antonio determines impervious cover or the stormwater fee, click here.
You can get an idea of how new rates and rate structure  — approved by SAWS Board of Trustees and San Antonio City Council Nov. 19, 2015 — will affect your monthly residential water bill. The new rates go into effect on or about Jan. 1, 2016.

Have a recent SAWS bill handy for reference.

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

Even with the approved rate adjustment, San Antonio’s rates will remain the lowest among Texas’ largest cities.

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 email SAWS Customer Service at