We read 14 results from Wasilla Water System’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 18,492 people · Water system ID AK2224646 · 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 1.2 to 9.3 · 2025 report, page 7 | 9.3 ppb | 0.004 ppb | 10 ppb | Above the health goal2,325x the health goal |
| Cadmiumsingle sample · sampled 2019 · 2025 report, page 7 | 0.15 ppb | 0.04 ppb | 5 ppb | Above the health goal3.8x the health goal |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 8 | 0.48 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.6x the health goal |
| Gross alpha (radioactivity)single sample · 2025 report, page 8 | 5.35 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.03 to 0.04 · sampled 2022 · 2025 report, page 7 | 0.04 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineas reported · 2025 report, page 7 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range 0.97 to 1.2 · sampled 2022 · 2025 report, page 7 | 1.2 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 11.3 to 15.3 · 2025 report, page 7 | 15.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 14.2 to 21.5 · 2025 report, page 7 | 21.5 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.05 to 0.4 · sampled 2023 · 2025 report, page 7 | 0.4 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganeseaverage · range 0.05 to 0.14 · printed as 45.445 ppb · 2025 report, page 9 | 0.05 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)single sample · 2025 report, page 7 | 2.3 ppm | 10 ppm | 10 ppm | Below the health goal |
| Total dissolved solidssingle sample · 2025 report, page 8 | 293 ppm | — | 500 ppm guideline | Within the guideline |
| Nickelsingle sample · 2025 report, page 8 | 2.4 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. 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 Wasilla Water System’s water between Aug 2023 and Mar 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS4.2 pptFound in 2 of 10 samples · highest resultNo federal limit in force for this one
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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity)
What removes it: Reverse osmosis.
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