We read 15 results from Rock Hill City of (Sc4610002)’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 82,846 people · Water system ID SC4610002 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Chloritehighest measured · range ND to 0.69 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 0.69 ppm | 0.05 ppm | 1 ppm | Above the health goal14x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 8 | 2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal10x the health goal |
| Radium (combined 226 + 228)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 8 | 1.41 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Total coliform bacteriahighest month · listed as a violation in the report · Distribution system · 2025 report, page 8 | 1.2 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Chlorinehighest measured · range 0.74 to 2.12 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 2.12 ppm | None set | 4 ppm | Below the legal limit |
| Chlorine dioxidehighest measured · range ND to 335 · listed as a violation in the report · printed as 0.335 ppm · Treatment plant · 2025 report, page 9 | 335 ppb | None set | 800 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 8 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)highest running annual average · range 14 to 71.1 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 52 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · listed as a violation in the report · Treatment plant · 2025 report, page 8 | 0.64 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 8 | 0.43 ppm | 10 ppm | 10 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 8 | 0.03 NTU | None set | 1 NTU | Below the legal limit |
| Hardnesshighest measured · listed as a violation in the report · Treatment plant · 2025 report, page 8 | 2.05 gpg (35 ppm) | — | — | Soft |
| PFHxA (a PFAS)average · range 3.7 to 4.4 · listed as a violation in the report · sampled 2024 · Treatment plant (UCMR5) · 2025 report, page 8 | 4 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range 3.9 to 5.9 · listed as a violation in the report · sampled 2024 · Treatment plant (UCMR5) · 2025 report, page 8 | 4.6 ppt | None set | None | No health limit |
| Total organic carbonhighest measured · range 1.24 to 1.75 · listed as a violation in the report · Treatment plant · 2025 report, page 9 | 1.75 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
More districts: South Carolina water quality · All states · Something look wrong? Tell us