We read 15 results from Waldorf - Charles County Dpw’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 84,296 people · Water system ID MD0080049 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range ND to 7.2 · listed as a violation in the report · All sources · 2025 report, page 4 | 7.2 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Gross beta (radioactivity)highest measured · range ND to 14.3 · listed as a violation in the report · sampled 2024 · All sources · 2025 report, page 4 | 14.3 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range 0.6 to 2.9 · listed as a violation in the report · sampled 2024 · All sources · 2025 report, page 4 | 2.9 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Total coliform bacteriahighest month · listed as a violation in the report · Distribution system · 2025 report, page 4 | 2.2 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Bariumhighest measured · listed as a violation in the report · Wells · 2025 report, page 3 | 0.31 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range ND to 3.9 · Distribution system · 2025 report, page 5 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4 | 0.23 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 30.2 · listed as a violation in the report · Waldorf water system · 2025 report, page 3 | 29.2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range ND to 88.9 · listed as a violation in the report · Waldorf water system · 2025 report, page 3 | 45.9 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range ND to 0.87 · listed as a violation in the report · Wells · 2025 report, page 3 | 0.87 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 4 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range ND to 0.03 · listed as a violation in the report · Wells · 2025 report, page 3 | 0.03 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFBS (a PFAS)average · range ND to 3.1 · listed as a violation in the report · Wells (UCMR5) · 2025 report, page 4 | 0.07 ppt | None set | None | No health limit |
| PFHxA (a PFAS)average · range ND to 5.1 · listed as a violation in the report · Wells (UCMR5) · 2025 report, page 4 | 0.19 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range ND to 6 · listed as a violation in the report · Wells (UCMR5) · 2025 report, page 4 | 0.32 ppt | 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 Waldorf - Charles County Dpw’s water between Jul 2024 and May 2026. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS3.1 pptFound in 1 of 37 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.
Radium and uranium
Found: Gross alpha (radioactivity), Gross beta (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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