We read 10 results from Brockton Water Department’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 105,643 people · Water system ID MA4044000 · 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 51 homes tested, 2 over the action level · sampled 2023 · Customer taps · 2025 report, page 4 | 4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal20x the health goal |
| Manganeseaverage · range 0.02 to 0.22 · listed as a violation in the report · printed as 87.5 ppb · Treated water · 2025 report, page 4 | 0.09 ppm | — | 0.05 ppm guideline | Above the guideline1.7x the guideline (taste, odor or stains; not a health limit) |
| Bariumsingle sample · Treated water · 2025 report, page 4 | 0.005 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 1.11 to 2.05 · Distribution system · 2025 report, page 4 | 1.53 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 51 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 31 · Distribution system · 2025 report, page 4 | 23 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 0.9 to 75 · Distribution system · 2025 report, page 4 | 50 ppb | None set | 80 ppb | Below the legal limit |
| Perchloratesingle sample · Treated water · 2025 report, page 4 | 0.1 ppb | 1 ppb | 6 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · Treatment plant · 2025 report, page 4 | 0.08 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumsingle sample · Treated water · 2025 report, page 5 | 29 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. 3 numbers we weren’t sure about are held back until a person checks.
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.
Sediment or cloudy water
Found: Manganese
What removes it: Oxidation filter.
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