We read 6 results from Layton City Water System’s 2024 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 82,000 people · Water system ID UTAH06018 · Read the district’s 2024 report (opens in a new tab)
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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 |
|---|---|---|---|---|
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2024 report, page 4 | 0.4 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.3x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2024 report, page 4 | 4.09 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal20x the health goal |
| Total coliform bacteriahighest month · listed as a violation in the report · Layton City distribution · 2024 report, page 3 | 4.8 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Chlorineaverage · range ND to 1 · listed as a violation in the report · Layton City distribution · 2024 report, page 3 | 0.14 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 7.6 to 50.3 · listed as a violation in the report · Weber Basin (purchased), highest of 2 sources · 2024 report, page 3 | 23 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 16.3 to 51.9 · listed as a violation in the report · Weber Basin (purchased), highest of 2 sources · 2024 report, page 3 | 36.5 ppb | None set | 80 ppb | Below the legal 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 Layton City Water System’s water between Jan 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium14 ppbFound in 2 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.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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