Tap water in San Antonio, TX — ZIP 78109
4 public water systems serving about 2,752,072 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 78109
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
Green Valley Sud
PWSID TX0940020 · serves 52,497 ·
surface water
0 health-based / 6 total violations (5 yrs)
· PFAS up to 4.9 ppt
City Of Converse
PWSID TX0150047 · serves 29,709 ·
surface water
0 health-based / 0 total violations (5 yrs)
East Central Sud
PWSID TX0150138 · serves 26,137 ·
surface water
0 health-based / 0 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology