We read 20 results from Liberty Utilities New York - Lynbrook’s 2025 water quality report. No results over a legal limit; 9 above a health goal or guideline.
Serves about 220,000 people · Water system ID NY2902835 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 |
|---|---|---|---|---|
| Arsenichighest measured · range ND to 4.9 · Raw wells · 2025 report, page 8 | 4.9 ppb | 0.004 ppb | 10 ppb | Above the health goal1,225x the health goal |
| Gross alpha (radioactivity)highest measured · range ND to 3.74 · sampled 2024 · Raw wells · 2025 report, page 7 | 3.74 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Ironhighest measured · range ND to 3.6 · Raw wells · 2025 report, page 8 | 3.6 ppm | — | 0.3 ppm guideline | Above the guideline12x the guideline (taste, odor or stains; not a health limit) |
| Lead90th percentile of 101 homes tested, 1 over the action level · Customer taps (101 samples) · 2025 report, page 7 | 4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal20x the health goal |
| Manganesehighest measured · range ND to 0.3 · Raw wells · 2025 report, page 8 | 0.3 ppm | — | 0.05 ppm guideline | Above the guideline6x the guideline (taste, odor or stains; not a health limit) |
| Perchloratehighest measured · range ND to 1.2 · Raw wells · 2025 report, page 9 | 1.2 ppb | 1 ppb | 6 ppb | Above the health goal1.2x the health goal |
| PFOA (a PFAS)single sample · Plant point of entry (blended) · 2025 report, page 9 | 2.71 ppt | 0.007 ppt | 10 ppt (New York) now; 4 ppt from 2029 | Above the health goal387x the health goal |
| PFOS (a PFAS)highest measured · range ND to 3 · Raw wells · 2025 report, page 8 | 3 ppt | 1 ppt | 10 ppt (New York) now; 4 ppt from 2029 | Above the health goal3x the health goal |
| Radium (combined 226 + 228)highest measured · range ND to 3.36 · sampled 2024 · Raw wells · 2025 report, page 7 | 3.36 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.002 to 0.11 · Raw wells · 2025 report, page 7 | 0.11 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 9 to 52.4 · Raw wells · 2025 report, page 8 | 52.4 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.37 to 1.81 · Plant point of entry · 2025 report, page 7 | 1.01 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 101 homes tested, 1 over the action level · Customer taps (101 samples) · 2025 report, page 7 | 0.18 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)highest running annual average · range 2.7 to 5.9 · Distribution system · 2025 report, page 7 | 4.75 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range ND to 0.15 · Raw wells · 2025 report, page 8 | 0.15 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 7.6 to 51.3 · Raw wells · 2025 report, page 8 | 51.3 ppm | — | 250 ppm guideline | Within the guideline |
| Uraniumhighest measured · range ND to 0.23 · sampled 2024 · Raw wells · 2025 report, page 7 | 0.23 ppb | 0.6 ppb | 30 ppb | Below the health goal |
| 1,4-Dioxanehighest measured · range ND to 0.18 · Raw wells · 2025 report, page 8 | 0.18 ppb | None set | None | No health limit |
| Hardnesshighest measured · range 0.25 to 3.43 · Raw wells · 2025 report, page 8 | 3.43 gpg (58.6 ppm) | — | — | Soft |
| Sodiumhighest measured · range 6.4 to 71.1 · Raw wells · 2025 report, page 8 | 71.1 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Liberty Utilities New York - Lynbrook’s water between Apr 2023 and Jul 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS5.1 pptFound in 1 of 35 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS6.3 pptFound in 2 of 35 samples · highest resultNo federal limit in force for this one
- PFNA4.1 pptFound in 1 of 35 samples · highest resultNo federal limit in force for this one
- Lithium14.9 ppbFound in 1 of 35 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
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: Gross alpha (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Sediment or cloudy water
Found: Iron, Manganese
What removes it: Oxidation filter.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Industrial chemicals and pesticides
Found: Perchlorate
What removes it: Carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOS (EPA testing)
What removes it: Reverse osmosis.
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