What was found in Rock Hill's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 4600 µg/L 46% of the EPA limit 10000 µg/L | 19/23 | SYR4 |
| Nitrate-Nitrite | 4500 µg/L 45% of the EPA limit 10000 µg/L | 17/23 | SYR4 |
| Copper | 2440 µg/L 188% of the EPA limit, in the worst sample — 1300 µg/L | 23/23 | SYR4 |
| Fluoride | 1200 µg/L 30% of the EPA limit 4000 µg/L | 13/23 | SYR4 |
| Lead | 528 µg/L 3520% of the EPA limit, in the worst sample — 15 µg/L | 20/23 | SYR4 |
| TTHM | 137.7 µg/L 172% of the EPA limit, in the worst sample — 80 µg/L | 12/23 | SYR4 |
| Barium | 110 µg/L 5.5% of the EPA limit 2000 µg/L | 4/23 | SYR4 |
| Bromodichloromethane | 94 µg/L No EPA limit set | 11/23 | SYR4 |
| Chloroform | 74.6 µg/L No EPA limit set | 12/23 | SYR4 |
| Trichloroacetic Acid | 72 µg/L No EPA limit set | 8/23 | SYR4 |
| Dibromochloromethane | 52 µg/L No EPA limit set | 9/23 | SYR4 |
| Total Haloacetic Acids (HAA5) | 47.97 µg/L 80% of the EPA limit 60 µg/L | 10/23 | SYR4 |
| Dichloroacetic Acid | 41.69 µg/L No EPA limit set | 9/23 | SYR4 |
| Toluene | 32.6 µg/L 3.3% of the EPA limit 1000 µg/L | 1/23 | SYR4 |
| Bromoform | 28.6 µg/L No EPA limit set | 6/23 | SYR4 |
| Gross Alpha, Excl. Radon And U | 13.4 pCi/L 89% of the EPA limit 15 pCi/L | 5/23 | SYR4 |
| Chromium | 13 µg/L 13% of the EPA limit 100 µg/L | 5/23 | SYR4 |
| Dibromoacetic Acid | 11.7 µg/L No EPA limit set | 6/23 | SYR4 |
| Monobromoacetic Acid | 10.96 µg/L No EPA limit set | 5/23 | SYR4 |
| Gross Beta Particle Activity | 6.81 pCi/L No EPA limit set | 3/23 | SYR4 |
| Selenium | 3.7 µg/L 7.4% of the EPA limit 50 µg/L | 4/23 | SYR4 |
| Combined Radium (-226 And -228) | 3.65 pCi/L 73% of the EPA limit 5 pCi/L | 6/23 | SYR4 |
| Combined Uranium | 3.3 µg/L 11% of the EPA limit 30 µg/L | 1/23 | SYR4 |
| Monochloroacetic Acid | 2.9 µg/L No EPA limit set | 2/23 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.6 µg/L 27% of the EPA limit 6 µg/L | 1/23 | SYR4 |
| Cadmium | 0.2500 µg/L 5% of the EPA limit 5 µg/L | 2/23 | SYR4 |
| Lead | 0.0130 mg/L 87% of the EPA limit 0.0150 mg/L | 23/23 | LCR |
| Pfpea | 0.0059 µg/L No EPA limit set | 1/23 | UCMR-5 |
| Pfhxa | 0.0044 µg/L No EPA limit set | 1/23 | UCMR-5 |
Water suppliers serving Rock Hill
Frequently asked questions about Rock Hill tap water
Is Rock Hill tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Rock Hill. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Rock Hill?
23 public water suppliers report drinking-water monitoring for Rock Hill, South Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Rock Hill's water?
The contaminants EPA monitoring detected in Rock Hill include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Lead. The full list, with the highest level found and the data source, is in the table above.
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.