We read 7 results from Waterbury Water Department’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 107,271 people · Water system ID CT1510011 · 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 50 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2025 report, page 14 | 4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal20x the health goal |
| Copper90th percentile of 50 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2025 report, page 14 | 0.19 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range 29 to 50 · Distribution system · 2025 report, page 15 | 44 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 29 to 66 · Distribution system · 2025 report, page 15 | 53 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · Treated water · 2025 report, page 14 | 0.65 ppm | 1 ppm | 4 ppm | Below the health goal |
| Total coliform bacteriahighest month · Distribution system · 2025 report, page 13 | Not detected | 0 % positive | 5 % positive | Not detected |
| Turbidity (cloudiness)highest measured · range 0.14 to 0.47 · Distribution system · 2025 report, page 13 | 0.47 NTU | None set | 1 NTU | Below the legal 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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