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States → South Carolina

MT PLEASANT WATER WORKS (1010002)

PWS ID: SC1010002 · MOUNT PLEASANT, South Carolina 29465-0330

PFAS Detected

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

Population Served
91,500
Total Violations
17
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
44,803
County
Charleston
School/Daycare
No
MCL Violations
1
Monitoring Violations
11
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 4 2006
E. COLI MR 4 2020
Lead and Copper Rule MR 3 1992
TTHM MCL 1 1987

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 19 of 360 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 8/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/15/2024 0.0063 µg/L 0.005 µg/L Detected
ADONA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/15/2024 0.0044 µg/L 0.003 µg/L Detected
PFHpS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/15/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/15/2024 <9 µg/L 9 µg/L Not Detected
PFHxA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFOA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/15/2024 0.0056 µg/L 0.004 µg/L Detected
PFNA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 8/15/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/15/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/15/2024 <0.008 µg/L 0.008 µg/L Not Detected
11Cl-PF3OUdS 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/15/2024 <9 µg/L 9 µg/L Not Detected
PFBS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/15/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/15/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/15/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/15/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/15/2024 <0.005 µg/L 0.005 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.