We read 23 results from Hudson Waterworks’s 2024 water quality report. No results over a legal limit; 8 above a health goal or guideline.
Serves about 17,635 people · Water system ID WI6560087 · Read the district’s 2024 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 |
|---|---|---|---|---|
| Arsenichighest measured · range ND to 1.5 · sampled 2023 · 2024 report, page 2 | 1.5 ppb | 0.004 ppb | 10 ppb | Above the health goal375x the health goal |
| Fluoridehighest measured · range 0.1 to 1.2 · sampled 2023 · Raw water, highest of 2 sources · 2024 report, page 2 | 1.2 ppm | 1 ppm | 4 ppm | Above the health goal1.2x the health goal |
| Gross alpha (radioactivity)highest measured · range 1.29 to 6.9 · sampled 2023 · 2024 report, page 2 | 6.9 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 30 homes tested, 0 over the action level · sampled 2023 · 2024 report, page 3 | 5.7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal29x the health goal |
| PFOA (a PFAS)highest measured · range ND to 0.89 · sampled 2023 · 2024 report, page 3 | 0.89 ppt | 0.007 ppt | 70 ppt (Wisconsin) now; 4 ppt from 2029 | Above the health goal127x the health goal |
| PFOS (a PFAS)highest measured · range ND to 2.8 · sampled 2023 · 2024 report, page 3 | 2.8 ppt | 1 ppt | 70 ppt (Wisconsin) now; 4 ppt from 2029 | Above the health goal2.8x the health goal |
| Radium (combined 226 + 228)highest measured · range 2.08 to 4.16 · sampled 2023 · 2024 report, page 2 | 4.16 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumhighest measured · range 0.09 to 14 · sampled 2023 · 2024 report, page 2 | 14 ppb | 0.6 ppb | 30 ppb | Above the health goal23x the health goal |
| Antimonyhighest measured · range ND to 0.37 · sampled 2023 · 2024 report, page 2 | 0.37 ppb | 1 ppb | 6 ppb | Below the health goal |
| Atrazinehighest measured · range ND to 0.04 · sampled 2023 · 2024 report, page 2 | 0.04 ppb | 0.15 ppb | 3 ppb | Below the health goal |
| Bariumhighest measured · range 0.004 to 0.02 · sampled 2023 · 2024 report, page 2 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.19 to 1.4 · 2024 report, page 3 | 0.61 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2023 · 2024 report, page 3 | 0.17 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 2.5 to 3.6 · D-29 · 2024 report, page 3 | 3.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 8.1 to 17 · D-29 · 2024 report, page 3 | 17 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range ND to 3.8 · 2024 report, page 2 | 3.8 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)highest measured · range ND to 2.2 · sampled 2023 · 2024 report, page 3 | 2.2 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Seleniumhighest measured · range ND to 3.2 · sampled 2023 · 2024 report, page 2 | 3.2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfateaverage · range 10 to 24 · sampled 2023 · 2024 report, page 2 | 22 ppm | — | 250 ppm guideline | Within the guideline |
| Nickelhighest measured · range ND to 29 · sampled 2023 · 2024 report, page 2 | 29 ppb | None set | None | No health limit |
| PFBS (a PFAS)highest measured · range ND to 1.2 · sampled 2023 · 2024 report, page 3 | 1.2 ppt | None set | None | No health limit |
| PFHxA (a PFAS)highest measured · range ND to 0.87 · sampled 2023 · 2024 report, page 3 | 0.87 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 4.6 to 54 · sampled 2023 · 2024 report, page 2 | 54 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 Hudson Waterworks’s water between May 2023 and Nov 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium16 ppbFound in 3 of 14 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.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
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)
What removes it: Reverse osmosis.
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