We read 15 results from Herriman City Municipal Water Department’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 60,000 people · Water system ID UTAH18157 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range ND to 4 · listed as a violation in the report · Sources · 2025 report | 4 ppb | 0.004 ppb | 10 ppb | Above the health goal1,000x the health goal |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report | 0.33 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.1x the health goal |
| Gross alpha (radioactivity)highest measured · range 1 to 9 · listed as a violation in the report · Sources · 2025 report | 9 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report | 4 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal20x the health goal |
| Radium (combined 226 + 228)highest measured · range 1 to 4 · listed as a violation in the report · Sources · 2025 report | 4 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumhighest measured · range 5 to 7.2 · listed as a violation in the report · Sources · 2025 report | 7.2 ppb | 0.6 ppb | 30 ppb | Above the health goal12x the health goal |
| Bariumhighest measured · range 0.007 to 0.21 · listed as a violation in the report · printed as 214 ppb · Sources · 2025 report | 0.21 ppm | 2 ppm | 2 ppm | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 10 to 32 · listed as a violation in the report · Distribution system · 2025 report | 32 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 24 to 68 · listed as a violation in the report · Distribution system · 2025 report | 68 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.14 to 0.29 · listed as a violation in the report · printed as 294 ppb · Sources · 2025 report | 0.29 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 2 to 4 · listed as a violation in the report · Sources · 2025 report | 4 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range ND to 8 · listed as a violation in the report · Sources · 2025 report | 8 ppb | 30 ppb | 50 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Wells · 2025 report | 0.13 NTU | None set | 1 NTU | Below the legal limit |
| Xyleneshighest measured · listed as a violation in the report · printed as 115 ppb · Sources · 2025 report | 0.12 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sodiumhighest measured · range 42 to 100 · listed as a violation in the report · Sources · 2025 report | 100 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 Herriman City Municipal Water Department’s water between Mar 2023 and Dec 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium33 ppbFound in 7 of 12 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.
Lead
Found: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
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