We read 17 results from Yonkers City’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 211,569 people · Water system ID NY5903465 · 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 |
|---|---|---|---|---|
| Lead90th percentile of 50 homes tested, 0 over the action level · Customer taps (50 sites) · 2025 report, page 12 | 7.14 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal36x the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 13 | 3.75 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Aluminumhighest measured · range 0.01 to 0.02 · printed as 18.4 ppb · Entry points · 2025 report, page 13 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.01 to 0.01 · printed as 14.7 ppb · Entry points · 2025 report, page 13 | 0.01 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 14.8 to 15.6 · Entry points · 2025 report, page 13 | 15.6 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.04 to 1.93 · Distribution system · 2025 report, page 13 | 0.92 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 51 homes tested, 0 over the action level · Customer taps (51 sites) · 2025 report, page 12 | 0.23 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 23 to 61 · Distribution system · 2025 report, page 12 | 48 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 14.1 to 53.3 · Distribution system · 2025 report, page 12 | 50.2 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.1 to 0.82 · Entry points · 2025 report, page 13 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Ironhighest measured · range 0.02 to 0.05 · printed as 45.8 ppb · Entry points · 2025 report, page 13 | 0.05 ppm | — | 0.3 ppm guideline | Within the guideline |
| Manganesehighest measured · range 0.001 to 0.01 · printed as 14.5 ppb · Entry points · 2025 report, page 13 | 0.01 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.15 to 0.19 · Entry points · 2025 report, page 13 | 0.19 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 3.59 to 3.65 · Entry points · 2025 report, page 13 | 3.65 ppm | — | 250 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.001 to 0.0016 · printed as 1.57 ppb · Entry points · 2025 report, page 13 | 0.0016 ppm | — | 5 ppm guideline | Within the guideline |
| Nickelhighest measured · range 0.38 to 0.4 · Entry points · 2025 report, page 13 | 0.4 ppb | None set | None | No health limit |
| Sodiumhighest measured · range 11 to 12.6 · Entry points · 2025 report, page 13 | 12.6 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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