We read 14 results from Guilderland Town WD’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 30,000 people · Water system ID NY0100205 · 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 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 6 | 2.84 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal14x the health goal |
| Radium (combined 226 + 228)single sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 0.76 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 · printed as 17.5 ug/L · Treatment plant · 2025 report, page 6 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridesingle sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 95.7 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.7 to 1.7 · listed as a violation in the report · Distribution system · 2025 report, page 7 | 1.23 ppm | None set | 4 ppm | Below the legal limit |
| 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 6 | 0.17 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 40.8 to 57.1 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 48.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 47.3 to 111 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 74.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridesingle sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)single sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 0.11 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatesingle sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 26.3 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 0.15 NTU | None set | 1 NTU | Below the legal limit |
| Nickelsingle sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 2.6 ppb | None set | None | No health limit |
| Sodiumsingle sample · listed as a violation in the report · Treatment plant · 2025 report, page 6 | 50.3 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.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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