We read 14 results from Niles City Pws’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 21,961 people · Water system ID OH7802403 · 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 60 homes tested, 0 over the action level · Customer taps, Jan-June · 2025 report, page 6 | 1.01 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5.1x the health goal |
| PFOS (a PFAS)single sample · printed as .0046 ppb · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 4.6 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.2x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Atrazineas reported · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 0.07 ppb | 0.15 ppb | 3 ppb | Below the health goal |
| Chlorineas reported · range 1.76 to 3.21 · Niles distribution system · 2025 report, page 6 | 2.27 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 60 homes tested, 0 over the action level · Customer taps · 2025 report, page 6 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 19.4 to 42.1 · Niles distribution system · 2025 report, page 6 | 37.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 32.6 to 78.7 · Niles distribution system · 2025 report, page 6 | 51.7 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.85 to 1.1 · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 1 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)as reported · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 4 | 0.33 ppm | 10 ppm | 10 ppm | Below the health goal |
| Simazineas reported · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 0.05 ppb | 4 ppb | 4 ppb | Below the health goal |
| Turbidity (cloudiness)as reported · range 0.02 to 0.09 · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 0.03 NTU | None set | 1 NTU | Below the legal limit |
| Bromodichloromethaneas reported · range 5.1 to 11.5 · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 6 | 8.2 ppb | None set | None | No health limit |
| Chloroformas reported · range 43.9 to 85.9 · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 6 | 55.4 ppb | None set | None | No health limit |
| Total organic carbonas reported · range 1.4 to 2.1 · Purchased (Mahoning Valley Sanitary District) · 2025 report, page 5 | 1.79 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Niles City Pws’s water between Jul 2024 and May 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS9 pptFound in 3 of 3 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS3.6 pptFound in 1 of 3 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOS (a PFAS), PFOS (EPA testing)
What removes it: Reverse osmosis.
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