ST JOHN'S WATER (SC1020002)
SC · PWS ID SC1020002 · Community water system
44
contaminants tested
19
detected
22,592
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0045 ug/L | 4/4 | 2025 |
| PFHxA | 0.0049 ug/L | 4/4 | 2025 |
| PFOA | 0.0054 ug/L | 4/4 | 2025 |
| PFOS | 0.0085 ug/L | 4/4 | 2025 |
| PFPeA | 0.0056 ug/L | 4/4 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 33.86 UG/L | 123/124 | SYR4 | 2012–2019 |
| Bromodichloromethane | 9.85 UG/L | 122/124 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 76.8 UG/L | 122/124 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 71.07 UG/L | 118/124 | SYR4 | 2012–2019 |
| Dibromochloromethane | 12.08 UG/L | 117/124 | SYR4 | 2012–2019 |
| Chloroform | 19.66 UG/L | 111/124 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 11.61 UG/L | 93/124 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 5.9 UG/L | 75/124 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 17.74 UG/L | 68/124 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.5084 mg/L | 20/20 | LCR | 2025 |
| Bromoform | 14.03 UG/L | 18/124 | SYR4 | 2012–2019 |
| COPPER, FREE | 130 UG/L | 14/70 | SYR4 | 2013–2019 |
| Lead | 8.4 UG/L | 14/70 | SYR4 | 2013–2019 |
| Monochloroacetic acid | 11.05 UG/L | 6/124 | SYR4 | 2012–2019 |
25 contaminants tested, none detected
11Cl-PF3OUdS4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAHFPO-DANEtFOSAANFDHANMeFOSAAPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAlithium
Areas served
JOHNS ISLAND (STA.)