San Antonio, Texas Water Quality Report
Comprehensive analysis of tap water safety based on EPA data
Last updated: January 2026
Is San Antonio's Water Safe to Drink?
Generally Safe. San Antonio's tap water meets EPA standards for drinking water quality. The water scored 90/100 in our analysis.
Contaminants Found in San Antonio's Water
1 contaminants tested • Data from EPA SDWIS database
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
Lead | 0.0016 mg/L | 0.015 mg/L | 10.7% | Safe |
Compliance Violations
Past EPA violations recorded for San Antonio's water system
other
Contaminant 7500 - 6/10/2016
Resolvedreporting
Contaminant 3100 - 2/1/2016
Resolvedother
Contaminant 7500 - 4/10/2013
Resolvedother
E. coli - 9/1/2012
ResolvedAbout San Antonio's Water System
SAN ANTONIO WATER SYSTEM
- PWS ID:
- TX0150018
- Population Served:
- 2,113,151
- Water Source:
- surface
A90/100
San Antonio Water Quality Score
Based on EPA contaminant data and compliance records
100
Contaminants
76
Compliance
85
Infrastructure
Positive Findings
- Excellent overall water quality
- No violations in the past 3 years
- No health-based (MCL) violations
- All tested contaminants well below EPA limits
Protect Your Family's Water
Even with good water quality, many families choose to filter their water for extra peace of mind.
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Other Cities in Texas
Compare water quality with nearby cities.
View all Texas cities →Frequently Asked Questions
- Where does San Antonio's water come from?
- San Antonio primarily uses surface water sources.
- How often is San Antonio's water tested?
- Water utilities are required to test for contaminants regularly and report results to the EPA.
- Should I use a water filter in San Antonio?
- While the water meets EPA standards, many families choose filters for extra peace of mind.