We read 13 results from Orem City Water System’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 98,129 people · Water system ID UTAH25020 · 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 1.9 · City of Orem · 2025 report, page 4 | 1.9 ppb | 0.004 ppb | 10 ppb | Above the health goal475x the health goal |
| Gross alpha (radioactivity)highest measured · sampled 2024 · City of Orem · 2025 report, page 4 | 4.1 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium-228highest measured · range 0.08 to 0.91 · sampled 2024 · City of Orem · 2025 report, page 4 | 0.91 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal48x the health goal |
| Bariumhighest measured · range 0.03 to 0.09 · City of Orem · 2025 report, page 4 | 0.09 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest measured · range 0.05 to 1.3 · sampled 2024 · City of Orem · 2025 report, page 3 | 1.3 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest measured · range ND to 32.6 · City of Orem · 2025 report, page 3 | 32.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range ND to 54.8 · City of Orem · 2025 report, page 3 | 54.8 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range ND to 0.21 · sampled 2024 · City of Orem · 2025 report, page 4 | 0.21 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.36 to 1.83 · City of Orem · 2025 report, page 4 | 1.83 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range ND to 4.2 · City of Orem · 2025 report, page 4 | 4.2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Total coliform bacteriahighest month · City of Orem · 2025 report, page 3 | Not detected | 0 % positive | 5 % positive | Not detected |
| Turbidity (cloudiness)highest measured · range ND to 0.32 · City of Orem · 2025 report, page 3 | 0.32 NTU | None set | 1 NTU | Below the legal limit |
| Lithiumhighest measured · range ND to 26.9 · City of Orem · 2025 report, page 5 | 26.9 ppb | 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 Orem City Water System’s water between Jan 2025 and Oct 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium26.9 ppbFound in 12 of 16 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-228
What removes it: Reverse osmosis.
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