We read 14 results from Dover Water Commission’s 2024 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 27,806 people · Water system ID NJ1409001 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2021 · Customer taps · 2024 report, page 2 | 4.6 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal23x the health goal |
| PFOA (a PFAS)highest running annual average · range 4 to 7 · listed as a violation in the report · sampled 2023 · Treatment plant TP002004 · 2024 report, page 2 | 7 ppt | 0.007 ppt | 14 ppt (New Jersey) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.8x the 4 ppt federal limit that takes effect in 2029; below the 14 ppt New Jersey 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 running annual average · range 4 to 8 · listed as a violation in the report · sampled 2023 · Treatment plants · 2024 report, page 2 | 6 ppt | 1 ppt | 13 ppt (New Jersey) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.5x the 4 ppt federal limit that takes effect in 2029; below the 13 ppt New Jersey limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Bariumas reported · listed as a violation in the report · sampled 2023 · Treatment plants · 2024 report, page 2 | 0.03 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest measured · range 0.05 to 1.4 · listed as a violation in the report · sampled 2023 · Distribution system · 2024 report, page 2 | 1.4 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)as reported · listed as a violation in the report · sampled 2023 · Treatment plants · 2024 report, page 2 | 1.4 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2021 · Customer taps · 2024 report, page 2 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 3 · listed as a violation in the report · sampled 2023 · Distribution system · 2024 report, page 2 | 3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 1 to 20 · listed as a violation in the report · sampled 2023 · Distribution system · 2024 report, page 2 | 15 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)as reported · listed as a violation in the report · sampled 2023 · Treatment plant TP001002 · 2024 report, page 2 | 1.1 ppm | 10 ppm | 10 ppm | Below the health goal |
| Total dissolved solidsas reported · sampled 2023 · Treatment plant TP002004 · 2024 report, page 3 | 454 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessas reported · sampled 2023 · Treatment plant TP002004 · 2024 report, page 3 | 8.19 gpg (140 ppm) | — | — | Hard |
| Nickelhighest measured · listed as a violation in the report · sampled 2023 · Treatment plant TP002004 · 2024 report, page 2 | 1.9 ppb | None set | None | No health limit |
| Sodiumaverage · range 68 to 81 · sampled 2023 · Treatment plant TP002004 · 2024 report, page 3 | 75 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 Dover Water Commission’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.
- PFOA12 pptFound in 4 of 4 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS8.1 pptFound in 4 of 4 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS5.6 pptFound in 4 of 4 samples · highest resultNo federal limit in force for this one
- PFBS3.6 pptFound in 1 of 4 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: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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