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States → South Carolina

SEABROOK ISLAND TOWN OF (1010009)

PWS ID: SC1010009 · JOHNS ISLAND, South Carolina 29453

PFAS Detected

5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
5,939
Total Violations
19
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
2,671
County
Charleston
School/Daycare
No
MCL Violations
1
Monitoring Violations
15
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 4 2024
Revised Total Coliform Rule MON 4 2024
Chlorine MR 4 2024
Coliform (TCR) MR 3 2003
Consumer Confidence Rule Other 3 2007
Coliform (TCR) MCL 1 2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 15 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFBA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/21/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/21/2024 0.0048 µg/L 0.003 µg/L Detected
PFMPA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/21/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFNA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 8/21/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/21/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFOS 8/21/2024 0.0063 µg/L 0.004 µg/L Detected
lithium 8/21/2024 <9 µg/L 9 µg/L Not Detected
PFHxS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/13/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/13/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/13/2024 0.0037 µg/L 0.003 µg/L Detected
6:2 FTS 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/13/2024 0.0061 µg/L 0.004 µg/L Detected
PFOA 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/13/2024 <0.02 µg/L 0.02 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.