We read 12 results from Tooele City Water System’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 37,100 people · Water system ID UTAH23004 · 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 1.4 · listed as a violation in the report · Sources · 2025 report, page 5 | 1.4 ppb | 0.004 ppb | 10 ppb | Above the health goal350x the health goal |
| Gross alpha (radioactivity)highest measured · listed as a violation in the report · Sources · 2025 report, page 4 | 0.69 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · listed as a violation in the report · Sources · 2025 report, page 4 | 0.79 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Total dissolved solidshighest measured · range 264 to 652 · listed as a violation in the report · Sources · 2025 report, page 5 | 652 ppm | — | 500 ppm guideline | Above the guideline1.3x the guideline (taste, odor or stains; not a health limit) |
| Bariumhighest measured · range 0.04 to 0.12 · listed as a violation in the report · printed as 122 ppb · Sources · 2025 report, page 5 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 5 | 0.17 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 4.7 to 5 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 1.4 to 5.2 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 5.2 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range 0.23 to 3.98 · listed as a violation in the report · Sources · 2025 report, page 5 | 3.98 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range 0.7 to 3.1 · listed as a violation in the report · Sources · 2025 report, page 5 | 3.1 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfatehighest measured · range 18 to 80 · listed as a violation in the report · Sources · 2025 report, page 5 | 80 ppm | — | 250 ppm guideline | Within the guideline |
| Sodiumhighest measured · range 11 to 103 · listed as a violation in the report · Sources · 2025 report, page 5 | 103 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Tooele City Water System’s water between May 2025 and Nov 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium36.1 ppbFound in 21 of 25 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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
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