We read 3 results from Dover Air Force Base’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 11,000 people · Water system ID DE0000579 · 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 |
|---|---|---|---|---|
| Cyanideas reported · range 178 to 178 · 2025 report, page 32 | 178 ppb | 150 ppb | 200 ppb | Above the health goal1.2x the health goal |
| Chloramineas reported · range 0.96 to 1.17 · 2025 report, page 17 | 1.17 ppm | None set | 4 ppm | Below the legal limit |
| Mercuryas reported · range 0.8 to 0.8 · 2025 report, page 24 | 0.8 ppb | 1.2 ppb | 2 ppb | 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. 164 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Dover Air Force Base’s water between Mar 2023 and Sep 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium17.5 ppbFound in 2 of 2 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 in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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