Tap water in Johns Island (Sta.), SC — ZIP 29455
4 public water systems serving about 316,852 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 29455
Charleston Water System (Sc1010001)
PWSID SC1010001 · serves 278,771 ·
surface water
2 health-based / 2 total violations (5 yrs)
· PFAS up to 6.5 ppt — above federal limit
St John's Water (Sc1020002)
PWSID SC1020002 · serves 22,592 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 8.5 ppt — above federal limit
Kiawah Island Utility (Sc1010008)
PWSID SC1010008 · serves 9,550 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 8.7 ppt — above federal limit
Seabrook Island Town Of (1010009)
PWSID SC1010009 · serves 5,939 ·
surface water
0 health-based / 3 total violations (5 yrs)
· PFAS up to 7.8 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