We read 10 results from Medfield Water Dept.’s 2024 water quality report. No results over a legal limit or above a health goal.
Serves about 12,894 people · Water system ID MA2175000 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 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 |
|---|---|---|---|---|
| Aluminumas reported · range ND to 0.04 · printed as 17 ppb · 2024 report, page 4 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumas reported · range ND to 0.05 · sampled 2023 · 2024 report, page 4 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideas reported · range 26.6 to 111 · 2024 report, page 4 | 59.8 ppm | — | 250 ppm guideline | Within the guideline |
| Disinfection byproducts (HAA5)as reported · range 8.3 to 18.9 · 2024 report, page 4 | 13.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range 9.1 to 13.1 · 2024 report, page 4 | 11.1 ppb | None set | 80 ppb | Below the legal limit |
| Manganeseas reported · range ND to 0.08 · printed as 18 ppb · 2024 report, page 4 | 0.02 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)as reported · range 0.11 to 0.85 · 2024 report, page 4 | 0.51 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateas reported · range 8.94 to 20.2 · 2024 report, page 4 | 12.7 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsas reported · range 143 to 386 · 2024 report, page 4 | 247 ppm | — | 500 ppm guideline | Within the guideline |
| Zincas reported · range 0.008 to 0.01 · 2024 report, page 4 | 0.009 ppm | — | 5 ppm guideline | Within the guideline |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Medfield Water Dept.’s water between Mar 2024 and Sep 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA7 pptFound in 2 of 6 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS6.7 pptFound in 2 of 6 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS4.6 pptFound in 2 of 6 samples · highest resultNo federal limit in force for this one
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
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.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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