We read 12 results from Fort Mill Town of (Sc4610003)’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 20,783 people · Water system ID SC4610003 · Read the district’s 2025 report (opens in a new tab)
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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 |
|---|---|---|---|---|
| Radium (combined 226 + 228)highest measured · range 1.41 to 1.41 · Purchased (City of Rock Hill) · 2025 report, page 4 | 1.41 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Chlorinehighest measured · Distribution system · 2025 report, page 3 | 1.7 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 3 | 0.07 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 8.8 to 26.6 · Distribution system · 2025 report, page 3 | 16 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 17.6 to 93.2 · Distribution system · 2025 report, page 3 | 32 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.64 to 0.64 · Purchased (City of Rock Hill) · 2025 report, page 4 | 0.64 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · Purchased (City of Rock Hill) · 2025 report, page 3 | 0.43 ppm | 10 ppm | 10 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · Purchased (City of Rock Hill) · 2025 report, page 4 | 0.03 NTU | None set | 1 NTU | Below the legal limit |
| Hardnesshighest measured · range 1.05 to 2.05 · Purchased (City of Rock Hill) · 2025 report, page 4 | 2.05 gpg (35 ppm) | — | — | Soft |
| PFHxA (a PFAS)average · range 3.1 to 4.4 · sampled 2024 · Distribution system · 2025 report, page 3 | 3.8 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range 3.2 to 4.6 · sampled 2024 · Distribution system · 2025 report, page 3 | 3.9 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 5.2 to 5.2 · Purchased (City of Rock Hill) · 2025 report, page 4 | 5.2 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.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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