We read 8 results from Charleston’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 17,286 people · Water system ID IL0290100 · 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 |
|---|---|---|---|---|
| Bromateas reported · 2025 report, page 4 | 1.4 ppb | 0.1 ppb | 10 ppb | Above the health goal14x the health goal |
| Bariumas reported · 2025 report, page 4 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloramineaverage · range 1.6 to 3.4 · 2025 report, page 4 | 2.3 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 74 homes tested, 0 over the action level · 2025 report, page 4 | 0.18 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 5.28 to 26 · 2025 report, page 4 | 11 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 10.9 to 32.3 · 2025 report, page 4 | 21 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.7 to 0.7 · 2025 report, page 4 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| PFPeA (a PFAS)single sample · printed as 0.0032 ppb · 2025 report, page 4 | 3.2 ppt | 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.
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