Charleston Water System (SC1010001)
Published drinking-water records and contacts for Charleston Water System (SC1010001). System SC1010001. Review sources and dates; not a real-time water assessment.
- System ID
- SC1010001
- State or territory
- SC
- Published population served
- 327422
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 120 — 2025-03-24 – 2025-12-09
- Lead and copper monitoring summaries: 18 — 1992-01-01 – 2024-12-31
- South Carolina PFAS surface-water treatment plant samples: 18 — 2020-09-16 – 2020-09-16
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Read the provider’s annual water quality report
Report link listed: 2026-10-13. This is not the report’s sampling date.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFBS | 0.0043 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFHxA | 0.0046 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFOA | 0.0047 µg/L | 0.004 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFOS | 0.0059 µg/L | 0.004 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFPeA | 0.0050 µg/L | 0.003 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2025-12-09 | Charleston Water System / G10001 |
| lithium | < 9 µg/L | 9 µg/L | 2025-12-09 | Charleston Water System / G10001 |
Download all EPA UCMR 5 records (CSV)
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0035 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0021 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.0023 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0.0013 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0.0023 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0.0045 mg/L | 2007-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.003 mg/L | 2004-01-01 – 2006-12-31 | 2026Q3 |
| Lead (PB90) | 0.004 mg/L | 2003-01-01 – 2003-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| PFDA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFTA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| HFPO-DA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFHxA | 3.1 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFNA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFTrDA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFDoA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFUnA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFBS | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFOA | 2.7 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| PFOS | 5.5 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
| ADONA | < 2.0 ng/L | 2020-09-16 | Charleston Water / South Carolina PFAS surface-water treatment plant samples |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
8 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Lead and Copper Rule / WQP Entry Point/Tap Treatment Technique Non-Compliance | 2025-07-01 – 2025-12-31 | Archived | Yes | 2026Q3 |
| Lead and Copper Rule / WQP Entry Point/Tap Treatment Technique Non-Compliance | 2025-01-01 – 2025-06-30 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Monitoring, Routine Minor (TCR) | 2004-07-01 – 2004-07-31 | Archived | No | 2026Q3 |
| Former Total Trihalomethane Rule / Maximum Contaminant Level Violation, Average | 1984-07-12 – 1985-07-11 | Archived | Yes | 2026Q3 |
| Former Total Trihalomethane Rule / Maximum Contaminant Level Violation, Average | 1984-07-01 – 1984-09-30 | Archived | Yes | 2026Q3 |
| Former Total Trihalomethane Rule / Maximum Contaminant Level Violation, Average | 1984-04-01 – 1984-06-30 | Archived | Yes | 2026Q3 |
| Former Total Trihalomethane Rule / Maximum Contaminant Level Violation, Average | 1984-01-01 – 1984-03-31 | Archived | Yes | 2026Q3 |
| Former Total Trihalomethane Rule / Maximum Contaminant Level Violation, Average | 1983-10-01 – 1983-12-31 | Archived | Yes | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- South Carolina PFAS surface-water treatment plant samples — last successful check: 2026-10-15
Administrative contact (EPA filing)
Ropp, Wesley: 843-863-4038
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.