SAWS: Backflow Ordinance
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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Backflow Prevention Ordinance

Backflow Prevention Ordinance

The Safe Drinking Water Act requires the installation and maintenance of an approved backflow prevention assembly at a water service connection that may present a potential for contamination.

Click here to download.

Through an ordinance, the city of San Antonio seeks to safegard public drinking water and protect the health of our customers by maintaining a high level of backflow prevention and cross-connection control.

Without proper protection devices, cross connections to the public water system can occur. To protect the system, backflow prevention assemblies (devices that prevent the backflow of water) are required for all connections that may present a potential source of contamination to the public water system.

For more information on the backflow ordinance or the program, please call the Backflow Prevention
section at 210-233-2421.

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