We read 5 results from Sunnyside City of’s 2024 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 17,037 people · Water system ID WA5385400 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 2.4 to 7.8 · 2024 report, page 2 | 7.8 ppb | 0.004 ppb | 10 ppb | Above the health goal1,950x the health goal |
| Gross alpha (radioactivity)single sample · 2024 report, page 2 | 0.42 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 30 homes tested · sampled 2022 · 2024 report, page 2 | 1.9 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal9.5x the health goal |
| Copper90th percentile of 30 homes tested · sampled 2022 · 2024 report, page 2 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Nitrate (as N)highest measured · range 0.5 to 1.97 · 2024 report, page 2 | 1.97 ppm | 10 ppm | 10 ppm | Below the health goal |
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 Sunnyside City of’s water between Aug 2025 and Aug 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium14 ppbFound in 3 of 6 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)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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