We read 19 results from Latham Water District’s 2021 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 85,590 people · Water system ID NY0100198 · Read the district’s 2021 report (opens in a new tab)
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Results from the 2021 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 |
|---|---|---|---|---|
| Arsenicsingle sample · listed as a violation in the report · printed as 0.0008 mg/L · sampled 2025 · Entry point · 2021 report, page 5 | 0.8 ppb | 0.004 ppb | 10 ppb | Above the health goal200x the health goal |
| Chloriteaverage · range 0.06 to 0.61 · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 7 | 0.37 ppm | 0.05 ppm | 1 ppm | Above the health goal7.4x the health goal |
| Gross beta (radioactivity)single sample · listed as a violation in the report · sampled 2023 · Entry point · 2021 report, page 7 | 0.71 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 60 homes tested, 0 over the action level · listed as a violation in the report · printed as 0.002 mg/L · sampled 2024 · Customer taps · 2021 report, page 5 | 2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal10x the health goal |
| Radium (combined 226 + 228)single sample · listed as a violation in the report · sampled 2023 · Entry point · 2021 report, page 7 | 0.61 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumsingle sample · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 5 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 30.9 to 89.1 · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 6 | 45.7 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 1.35 to 3.46 · listed as a violation in the report · sampled 2025 · Entry point, highest of 2 sources · 2021 report, page 6 | 2.28 ppm | None set | 4 ppm | Below the legal limit |
| Chlorine dioxideaverage · range ND to 140 · listed as a violation in the report · printed as 0.02 mg/L · sampled 2025 · Entry point · 2021 report, page 6 | 20 ppb | None set | 800 ppb | Below the legal limit |
| Copper90th percentile of 60 homes tested, 0 over the action level · listed as a violation in the report · sampled 2024 · Customer taps · 2021 report, page 5 | 0.18 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 12.7 to 63 · listed as a violation in the report · sampled 2025 · Distribution system · 2021 report, page 6 | 39.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 25.3 to 77.6 · listed as a violation in the report · sampled 2025 · Distribution system · 2021 report, page 6 | 70.2 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)single sample · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 5 | 0.78 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatesingle sample · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 5 | 68 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · sampled 2025 · Treatment plant · 2021 report, page 5 | 0.17 NTU | None set | 1 NTU | Below the legal limit |
| Uraniumsingle sample · listed as a violation in the report · sampled 2023 · Entry point · 2021 report, page 7 | 0.01 ppb | 0.6 ppb | 30 ppb | Below the health goal |
| Chlorateaverage · range 150 to 350 · listed as a violation in the report · sampled 2025 · Distribution system · 2021 report, page 7 | 237 ppb | None set | None | No health limit |
| Hardnessaverage · range 5.94 to 9.58 · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 6 | 7.65 gpg (131 ppm) | — | — | Hard |
| Sodiumsingle sample · listed as a violation in the report · sampled 2025 · Entry point · 2021 report, page 5 | 50 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.
Radium and uranium
Found: Gross beta (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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