We read 13 results from New London Dept. of Public Utilities’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 27,620 people · Water system ID CT0950011 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · New London customer taps · 2025 report, page 4 | 2.4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal12x the health goal |
| Bariumhighest measured · Treatment plant · 2025 report, page 4 | 0.005 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · Treatment plant · 2025 report, page 4 | 19.2 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest measured · range 0.29 to 1.97 · New London distribution · 2025 report, page 4 | 1.59 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · New London customer taps · 2025 report, page 4 | 0.16 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 16 to 37 · New London distribution · 2025 report, page 4 | 33 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 28 to 74 · New London distribution · 2025 report, page 4 | 60 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · Treatment plant · 2025 report, page 4 | 0.84 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · Treatment plant · 2025 report, page 4 | 0.05 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · Treatment plant · 2025 report, page 4 | 5.4 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Treatment plant · 2025 report, page 4 | 0.17 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumhighest measured · Treatment plant · 2025 report, page 4 | 10.1 ppm | None set | None | No health limit |
| Total organic carbonhighest measured · Treatment plant · 2025 report, page 4 | 1.7 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.
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.
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