We read 14 results from City of Winston-Salem’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 388,060 people · Water system ID NC0234010 · 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 |
|---|---|---|---|---|
| Chlorineaverage · range 0.02 to 1.98 · Distribution system · 2025 report | 1.02 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report | Not detected | 0.3 ppm | 1.3 ppm (action level) | Not detected |
| Disinfection byproducts (HAA5)average · range 1.4 to 55.3 · Distribution system (12 sites) · 2025 report | 38.7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 17.5 to 107 · Distribution system (12 sites) · 2025 report | 69.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.53 to 0.83 · Treatment plants · 2025 report | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 1.15 · Treatment plants · 2025 report | 0.18 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFOS (a PFAS)average · range ND to 2.1 · Treatment plants · 2025 report | 0.18 ppt | 1 ppt | 4 ppt from 2029 | Below the health goal |
| pHaverage · range 6.4 to 8 · Treated water · 2025 report | 7.5 | — | — | Normal range |
| Total coliform bacteriahighest month · Distribution system · 2025 report | Not detected | 0 % positive | 5 % positive | Not detected |
| Turbidity (cloudiness)average · range 0.02 to 0.13 · Treatment plants · 2025 report | 0.05 NTU | None set | 1 NTU | Below the legal limit |
| Hardnessaverage · range 0.53 to 1.64 · Treated water · 2025 report | 1.02 gpg (17.5 ppm) | — | — | Soft |
| PFBA (a PFAS)average · range ND to 2.1 · Treatment plants · 2025 report | 0.18 ppt | None set | None | No health limit |
| Sodiumaverage · Treated water · 2025 report | 9.73 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.
What you can do
Nothing in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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