We read 13 results from Metropolitan District Commission’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 390,887 people · Water system ID CT0640011 · 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 65 homes tested, 3 over the action level · sampled 2023 · Customer taps · 2025 report, page 8 | 7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal35x the health goal |
| Bariumaverage · range 0.006 to 0.007 · System · 2025 report, page 8 | 0.006 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 8.77 to 11.2 · System · 2025 report, page 8 | 10.1 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.01 to 1.04 · Distribution system · 2025 report, page 8 | 0.5 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 65 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 8 | 0.16 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 4.25 to 53.3 · Distribution system · 2025 report, page 8 | 41.4 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 7.76 to 72.3 · Distribution system · 2025 report, page 8 | 56.8 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.6 to 0.86 · System · 2025 report, page 8 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)average · range ND to 0.05 · System · 2025 report, page 8 | 0.04 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHaverage · range 7.13 to 7.99 · System · 2025 report, page 8 | 7.41 | — | — | Normal range |
| Sulfateaverage · range 3.6 to 7.9 · System · 2025 report, page 8 | 5.1 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)average · range 0.04 to 0.47 · West Hartford plant, highest of 2 sources · 2025 report, page 8 | 0.08 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumaverage · range 7.7 to 17.8 · System · 2025 report, page 8 | 10.9 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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