Aquifer Beaker

Edwards Aquifer

Aquifer Level 629.7'
9/19/14 - 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 629.7 | Stage 2: Water On Your Day

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BexarMet Integration

Northeast Service Area
Returning to Lake Dunlap Water

San Antonio Water System is managing water resources by returning a small service area in northeast San Antonio back to surface water from Lake Dunlap – the source of water previously supplied to this service area. By switching customers back to Lake Dunlap water, SAWS will reduce demand on the Edwards Aquifer by using diverse, non-Edwards sources for its customers.

This alternative source of water meets drinking water quality standards established by the Texas Commission for Environmental Quality (TCEQ). Although customers should not notice any change in taste, odor or appearance in water quality, SAWS will conduct limited flushing in order to maintain high water quality standards.

The return to surface water from Lake Dunlap also follows a disinfection project that was initiated in February. SAWS initiated the process to clean pipes serving about 15,000 residential and commercial customers. Now, in August, the pipe cleaning process is complete, and we are switching the source for this water back to Lake Dunlap.

    Map of area
    Click on map to enlarge.
  • This completes the periodic maintenance that is performed on the pipes that deliver water from Lake Dunlap.
  • The area will return to chloramine disinfection.
  • Reversing the cleaning process and switching back to chloramine disinfection may require some flushing of water from the system. You may notice water flowing from water tanks and fire hydrants in the area.
  • Because the disinfection method is changing, medical facilities and dialysis operators should test the water to determine if different treatment measures are needed. In addition, people or businesses that keep live fish may also need to test to determine if a different treatment is needed.
  • Canyon Regional Water Authority (Canyon Regional) provides surface water from Lake Dunlap to 11 communities, including Cibolo, portions of New Braunfels and San Marcos, and the northeast San Antonio area formerly served by BexarMet.