We read 12 results from Ithaca City’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 29,457 people · Water system ID NY5404416 · 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 |
|---|---|---|---|---|
| Chloritehighest measured · range 0.2 to 0.31 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 0.31 ppm | 0.05 ppm | 1 ppm | Above the health goal6.2x the health goal |
| Lead90th percentile of homes tested · listed as a violation in the report · Customer taps · 2025 report, page 4 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Bariumhighest measured · range 0.04 to 0.07 · listed as a violation in the report · printed as 66.0 ug/L · Treatment plant · 2025 report, page 4 | 0.07 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 46.8 to 104 · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 104 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorine dioxidehighest measured · range 50 to 280 · listed as a violation in the report · printed as 0.28 mg/L · Entry point · 2025 report, page 4 | 280 ppb | None set | 800 ppb | Below the legal limit |
| Copper90th percentile of homes tested · listed as a violation in the report · Customer taps · 2025 report, page 4 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 21 to 46 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 46 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 29 to 72 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 72 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)single sample · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 0.22 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 10.2 to 12 · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 12 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · range 0.03 to 0.43 · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 0.43 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumhighest measured · range 23.6 to 51.1 · listed as a violation in the report · Treatment plant · 2025 report, page 4 | 51.1 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 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.
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