Tap water in Round Rock, TX — ZIP 78664
4 public water systems serving about 221,402 people. PFAS "forever chemicals" have been detected here.
F
Failing
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 78664
City Of Round Rock
PWSID TX2460003 · serves 130,662 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6.7 ppt
Manville Wsc
PWSID TX2270033 · serves 39,648 ·
surface water
4 health-based / 9 total violations (5 yrs)
· PFAS up to 24.3 ppt — above federal limit
Jonah Water Sud
PWSID TX2460022 · serves 29,861 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 21.2 ppt — above federal limit
Windermere Community
PWSID TX2270161 · serves 21,231 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 9.2 ppt — above federal limit
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology