Safe
Texas, United States
·
Last reviewed:
Is Tap Water Safe to Drink in San Antonio?
Yes, tap water in San Antonio is safe to drink. It's sourced primarily from the pristine Edwards Aquifer, one of the most productive artesian aquifers in the U.S., treated by the San Antonio Water System.
Hardness
Hard
pH
7.2–7.6
TDS
ranges 300–450 ppm
EPA Status
Compliant
Soft
Moderate
Hard
Very Hard
Water Source
The San Antonio Water System (SAWS) draws primarily from the Edwards Aquifer, a naturally filtered limestone aquifer, supplemented by other regional groundwater and surface sources for supply diversification.
EPA Compliance Status
Meets all federal Safe Drinking Water Act standards.
Notable Contaminants & Context
- •No significant compliance concerns
- •The Edwards Aquifer is a federally protected habitat for several endangered species, which drives regional conservation policy but is not itself a drinking-water safety issue
How It Compares
The Edwards Aquifer is widely regarded as one of the cleanest natural drinking water sources in Texas, requiring comparatively light treatment thanks to natural limestone filtration.
Tips
- •A water softener addresses hardness/taste preference but isn't required for safety
- •SAWS publishes an annual water quality report
- •No need for bottled water around the city
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality