We read 9 results from Leominster Water Division’s 2024 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 41,683 people · Water system ID MA2153000 · Read the district’s 2024 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 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 |
|---|---|---|---|---|
| Lead90th percentile of 61 homes tested, 0 over the action level · listed as a violation in the report · printed as 0.0028 ppm · sampled 2025 · Customer taps · 2024 report, page 5 | 2.8 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal14x the health goal |
| Bariumhighest measured · range ND to 0.01 · listed as a violation in the report · sampled 2025 · Treated water · 2024 report, page 6 | 0.01 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest measured · range 0.04 to 1.7 · listed as a violation in the report · sampled 2025 · Distribution system · 2024 report, page 6 | 1.7 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 61 homes tested, 0 over the action level · listed as a violation in the report · sampled 2025 · Customer taps · 2024 report, page 5 | 0.14 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 60 · listed as a violation in the report · sampled 2025 · Distribution system · 2024 report, page 6 | 60 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 2.8 to 69 · listed as a violation in the report · sampled 2025 · Distribution system · 2024 report, page 6 | 69 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range ND to 0.28 · listed as a violation in the report · sampled 2025 · Southeast Wells · 2024 report, page 6 | 0.28 ppm | 10 ppm | 10 ppm | Below the health goal |
| Perchloratehighest measured · range 0.09 to 0.29 · listed as a violation in the report · sampled 2025 · Treated water · 2024 report, page 6 | 0.29 ppb | 1 ppb | 6 ppb | Below the health goal |
| Sodiumaverage · sampled 2025 · Treated water · 2024 report, page 7 | 20.6 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Leominster Water Division’s water between Sep 2023 and Jan 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.3 pptFound in 1 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (EPA testing)
What removes it: Reverse osmosis.
More districts: Massachusetts water quality · All states · Something look wrong? Tell us