We read 14 results from Carbondale’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 22,107 people · Water system ID IL0770150 · 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 0.67 to 0.67 · sampled 2020 · Treated water · 2025 report, page 4 | 0.67 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Aluminumhighest measured · range 0.03 to 0.03 · Treated water · 2025 report, page 4 | 0.03 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.02 to 0.02 · Treated water · 2025 report, page 4 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloraminehighest measured · range 2 to 3 · Distribution system · 2025 report, page 3 | 2.6 ppm | None set | 4 ppm | Below the legal limit |
| Chloridehighest measured · range 11 to 11 · Treated water · 2025 report, page 4 | 11 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | 0.04 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 14.9 to 40.2 · Distribution system · 2025 report, page 3 | 32 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 37.5 to 100 · Distribution system · 2025 report, page 3 | 75 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.71 to 0.71 · Treated water · 2025 report, page 3 | 0.71 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganesehighest measured · range 0.0043 to 0.0043 · printed as 4.3 ppb · Treated water · 2025 report, page 4 | 0.0043 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.13 to 0.13 · Treated water · 2025 report, page 4 | 0.13 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 20 to 20 · Treated water · 2025 report, page 4 | 20 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Treated water · 2025 report, page 4 | 0.2 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumhighest measured · range 17 to 17 · Treated water · 2025 report, page 4 | 17 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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