We read 14 results from Dover Twp Water Sys’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.
Serves about 21,097 people · Water system ID PA7670073 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 1 to 2 · sampled 2024 · Wells / entry points · 2025 report, page 3 | 2 ppb | 0.004 ppb | 10 ppb | Above the health goal500x the health goal |
| Gross alpha (radioactivity)highest measured · range 1.4 to 7.89 · sampled 2023 · Wells / entry points · 2025 report, page 3 | 7.89 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 31 homes tested, 0 over the action level · Customer taps · 2025 report, page 4 | 4.9 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal25x the health goal |
| PFOA (a PFAS)highest measured · range ND to 6.8 · Wells / entry points · 2025 report, page 3 | 6.8 ppt | 0.007 ppt | 14 ppt (Pennsylvania) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.7x the 4 ppt federal limit that takes effect in 2029; below the 14 ppt Pennsylvania limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOS (a PFAS)highest measured · range 2.4 to 12 · Wells / entry points · 2025 report, page 3 | 12 ppt | 1 ppt | 18 ppt (Pennsylvania) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20293x the 4 ppt federal limit that takes effect in 2029; below the 18 ppt Pennsylvania limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Radium (combined 226 + 228)highest measured · range 1.67 to 1.67 · sampled 2023 · Wells / entry points · 2025 report, page 3 | 1.67 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Trichloroethylene (TCE)highest measured · Wells / entry points · 2025 report, page 3 | 3.1 ppb | 1.7 ppb | 5 ppb | Above the health goal1.8x the health goal |
| Uraniumhighest measured · range 1.1 to 15 · sampled 2023 · Wells / entry points · 2025 report, page 3 | 15 ppb | 0.6 ppb | 30 ppb | Above the health goal25x the health goal |
| Bariumhighest measured · range 0.04 to 0.27 · sampled 2024 · Wells / entry points · 2025 report, page 3 | 0.27 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.22 to 2.2 · Distribution system · 2025 report, page 3 | 0.83 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 39.7 · Distribution system · 2025 report, page 3 | 14.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 1.75 to 51.2 · Distribution system · 2025 report, page 3 | 23.7 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.2 to 0.45 · sampled 2024 · Wells / entry points · 2025 report, page 3 | 0.45 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 2.1 to 4.05 · Wells / entry points · 2025 report, page 3 | 4.05 ppm | 10 ppm | 10 ppm | Below the health goal |
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 Dover Twp Water Sys’s water between May 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA5.9 pptFound in 9 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS9.6 pptFound in 11 of 20 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS5.7 pptFound in 11 of 20 samples · highest resultNo federal limit in force for this one
- Lithium58.8 ppbFound in 15 of 20 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Trichloroethylene (TCE)
What removes it: Carbon block or RO.
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