Tap Water Quality in San Antonio, TX
Find out what's in your drinking water. Enter your ZIP code below for a detailed water quality report for San Antonio, Texas.
Try 78205 for San Antonio
San Antonio Drinking Water Overview
Population: ~1,500,000 | Source: Edwards Aquifer and Canyon Lake
San Antonio has historically relied on the Edwards Aquifer, a massive karst limestone aquifer that provides naturally filtered water. The city has diversified its supply to include surface water from Canyon Lake and the Vista Ridge pipeline from Central Texas. The karst geology means the aquifer is vulnerable to surface contamination, and drought can significantly reduce supply.
Common water quality concerns in San Antonio
Naturally occurring minerals
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Arsenic in some wells
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Drought vulnerability
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What's in your San Antonio water report
Contaminant levels
Every detected contaminant in your San Antonio water system, compared to EPA limits and health guidelines.
Violation history
All EPA violations on record for water systems serving San Antonio, including health-based and monitoring violations.
Water quality grade
An A through F grade based on violation history, contaminant levels, and health guideline comparisons.
Filter recommendations
Which type of water filter will actually remove the contaminants found in your specific water system.
Water quality in nearby cities
Check your San Antonio water now
Enter your ZIP code for a free water quality report specific to your water system in San Antonio, Texas.