Is Johns Island (Sta.), South Carolina tap water safe?
2 water systems report serving Johns Island (Sta.). Your water depends on which one serves your address. Check your bill if unsure.
C
St John's Water
Serves 22,592 people · Surface water · Full report →
No health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
B
Kiawah Island Utility
Serves 9,550 people · Surface water · Full report →
No health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS; Lead 90th percentile below the action level (2024).