We read 8 results from City of Arcata’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 20,875 people · Water system ID CA1210001 · 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 31 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 6 | 1.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal3.7x the health goal |
| Lead90th percentile of 31 homes tested, 0 over the action level · sampled 2022 · Customer taps · 2024 report, page 6 | 2.1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal11x the health goal |
| Chlorineaverage · range 0.2 to 1 · Distribution system · 2024 report, page 6 | 0.6 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)average · range 5 to 10 · Distribution system · 2024 report, page 6 | 7.5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · Distribution system · 2024 report, page 6 | 15 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · sampled 2022 · Distribution system · 2024 report, page 6 | 0.06 ppm | 1 ppm | 2 ppm | Below the health goal |
| Turbidity (cloudiness)average · range 0.02 to 0.5 · Distribution system · 2024 report, page 7 | 0.08 NTU | None set | 1 NTU | Below the legal limit |
| Alkalinityaverage · sampled 2016 · Distribution system · 2024 report, page 7 | 79 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. 2 numbers we weren’t sure about are held back until a person checks.
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.
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