We read 27 results from Glen Cove City’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 28,000 people · Water system ID NY2902826 · 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 |
|---|---|---|---|---|
| Copper90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 3 | 0.41 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.4x the health goal |
| Gross alpha (radioactivity)highest measured · range 0.06 to 2.22 · Wells · 2025 report, page 3 | 2.22 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)highest measured · range 1.58 to 3.42 · Wells · 2025 report, page 3 | 3.42 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Perchloratehighest measured · range ND to 2.2 · Wells · 2025 report, page 3 | 2.2 ppb | 1 ppb | 6 ppb | Above the health goal2.2x the health goal |
| PFOS (a PFAS)highest measured · range ND to 4.86 · listed as a violation in the report · Wells · 2025 report, page 3 | 4.86 ppt | 1 ppt | 10 ppt (New York) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.2x the 4 ppt federal limit that takes effect in 2029; below the 10 ppt New York limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Radium (combined 226 + 228)highest measured · range 0.2 to 1.97 · Wells · 2025 report, page 3 | 1.97 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.02 to 0.04 · Wells · 2025 report, page 3 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 19.3 to 45.7 · Wells · 2025 report, page 3 | 45.7 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest measured · range 0.4 to 1 · Distribution system · 2025 report, page 4 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range ND to 15.9 · Distribution system · 2025 report, page 3 | 15.9 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range 3.1 to 5.9 · Wells · 2025 report, page 3 | 5.9 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)highest measured · range ND to 7.17 · Wells · 2025 report, page 3 | 7.17 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFNA (a PFAS)highest measured · range ND to 7.6 · Wells · 2025 report, page 3 | 7.6 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Seleniumhighest measured · range ND to 2.2 · Wells · 2025 report, page 3 | 2.2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfatehighest measured · range 13.4 to 32.3 · Wells · 2025 report, page 3 | 32.3 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 94 to 200 · Wells · 2025 report, page 4 | 200 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range ND to 0.08 · Wells · 2025 report, page 3 | 0.08 ppm | — | 5 ppm guideline | Within the guideline |
| Calciumhighest measured · range 12.9 to 21.1 · Wells · 2025 report, page 3 | 21.1 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 3.11 to 5.24 · Wells · 2025 report, page 4 | 5.24 gpg (89.6 ppm) | — | — | Moderately hard |
| Magnesiumhighest measured · range 5.1 to 9 · Wells · 2025 report, page 3 | 9 ppm | None set | None | No health limit |
| Nickelhighest measured · range ND to 0.83 · printed as 0.00083 ppm · Wells · 2025 report, page 3 | 0.83 ppb | None set | None | No health limit |
| PFBA (a PFAS)highest measured · range ND to 6.1 · Wells · 2025 report, page 3 | 6.1 ppt | None set | None | No health limit |
| PFBS (a PFAS)highest measured · range ND to 2.43 · Wells · 2025 report, page 3 | 2.43 ppt | None set | None | No health limit |
| PFHpA (a PFAS)highest measured · range ND to 5.35 · Wells · 2025 report, page 3 | 5.35 ppt | None set | None | No health limit |
| PFHxA (a PFAS)highest measured · range ND to 8.81 · Wells · 2025 report, page 3 | 8.81 ppt | None set | None | No health limit |
| PFPeA (a PFAS)highest measured · range ND to 12.5 · Wells · 2025 report, page 3 | 12.5 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 11.4 to 23.7 · Wells · 2025 report, page 3 | 23.7 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Glen Cove City’s water between Oct 2023 and May 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.5 pptFound in 3 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Gross beta (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Perchlorate
What removes it: Carbon block or RO.
PFAS ("forever chemicals")
Found: PFOS (a PFAS), PFOA (EPA testing)
What removes it: Reverse osmosis.
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