Tap water in San Antonio, TX — ZIP 78238
2 public water systems serving about 2,650,599 people. PFAS "forever chemicals" have been detected here.
C
Fair
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 78238
San Antonio Water System
PWSID TX0150018 · serves 2,643,729 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 9.2 ppt
City Of Leon Valley
PWSID TX0150178 · serves 6,870 ·
groundwater
0 health-based / 43 total violations (5 yrs)
· PFAS up to 3.1 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology