We read 15 results from City of Williamsburg’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 16,300 people · Water system ID VA3830850 · 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 |
|---|---|---|---|---|
| Chloriteaverage · range 0.17 to 0.34 · 2025 report, page 9 | 0.25 ppm | 0.05 ppm | 1 ppm | Above the health goal5x the health goal |
| Gross beta (radioactivity)single sample · 2025 report, page 9 | 2.4 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · 2025 report, page 9 | 1.93 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal9.6x the health goal |
| Aluminumsingle sample · 2025 report, page 9 | 0.14 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumsingle sample · 2025 report, page 9 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridesingle sample · 2025 report, page 9 | 27 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.6 to 2 · 2025 report, page 9 | 1.4 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · 2025 report, page 9 | 0.14 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 25 to 51 · 2025 report, page 9 | 41 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 33 to 94 · 2025 report, page 9 | 71 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.59 to 0.78 · 2025 report, page 9 | 0.65 ppm | 1 ppm | 4 ppm | Below the health goal |
| pHsingle sample · 2025 report, page 9 | 7.92 | — | — | Normal range |
| Sulfatesingle sample · 2025 report, page 9 | 24 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidssingle sample · 2025 report, page 9 | 117 ppm | — | 500 ppm guideline | Within the guideline |
| Sodiumsingle sample · 2025 report, page 9 | 23 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 City of Williamsburg’s water between Jan 2024 and Oct 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS3.1 pptFound in 3 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.
Radium and uranium
Found: Gross beta (radioactivity)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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