Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 1984-07-12 → 1985-07-11 |
| MCL | Health-based | Archived | 1984-07-01 → 1984-09-30 |
| MCL | Health-based | Archived | 1984-04-01 → 1984-06-30 |
| MCL | Health-based | Archived | 1984-01-01 → 1984-03-31 |
| MCL | Health-based | Archived | 1983-10-01 → 1983-12-31 |
| MR | Monitoring | Archived | 2004-07-01 → 2004-07-31 |
| MR | Monitoring | Resolved | 2002-10-01 |
| MR | Monitoring | Resolved | 2002-10-01 |
| MR | Monitoring | Resolved | 1993-07-01 → 1993-09-30 |
| MR | Monitoring | Resolved | 1993-07-01 → 1993-09-30 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 51.88 µg/L 65% of the EPA limit 80 µg/L | 251/252 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 86.09 µg/L 143% of the EPA limit, in the worst sample — 60 µg/L | 251/252 | SYR4 | 2012–2019 |
| Bromodichloromethane | 12.36 µg/L No EPA limit set | 247/252 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 78.93 µg/L No EPA limit set | 244/252 | SYR4 | 2012–2019 |
| Dibromochloromethane | 12.17 µg/L No EPA limit set | 241/252 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 10.15 µg/L No EPA limit set | 230/252 | SYR4 | 2012–2019 |
| Chloroform | 39.52 µg/L No EPA limit set | 215/252 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 5.62 µg/L No EPA limit set | 205/252 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 6.19 µg/L No EPA limit set | 163/252 | SYR4 | 2012–2019 |
| Copper | 180 µg/L 14% of the EPA limit 1300 µg/L | 44/151 | SYR4 | 2012–2018 |
| Lead | 17 µg/L 113% of the EPA limit, in the worst sample — 15 µg/L | 42/151 | SYR4 | 2012–2018 |
| Bromoform | 15.45 µg/L No EPA limit set | 32/252 | SYR4 | 2012–2019 |
| Lead | 0.0035 mg/L 23% of the EPA limit 0.0150 mg/L | 18/18 | LCR | 2024 |
| Nitrate | 520 µg/L 5.2% of the EPA limit 10000 µg/L | 16/16 | SYR4 | 2012–2019 |
| Fluoride | 590 µg/L 15% of the EPA limit 4000 µg/L | 6/8 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 13.03 µg/L No EPA limit set | 5/252 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 100 µg/L 1% of the EPA limit 10000 µg/L | 1/1 | SYR4 | 2017 |
85 contaminants tested, none detected
Utility contact
Frequently asked questions about Charleston Water System (sc1010001)
Is Charleston Water System (sc1010001) tap water safe to drink?
EPA monitoring detected 22 contaminants in Charleston Water System (sc1010001)'s water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Charleston Water System (sc1010001)'s water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Dichloroacetic Acid, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Charleston Water System (sc1010001) serve?
Charleston Water System (sc1010001) reports serving 327,422 people in South Carolina, per its EPA record.
Has Charleston Water System (sc1010001) had any water quality violations?
The EPA has 21 violations on file for Charleston Water System (sc1010001), of which 5 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.