We read 7 results from North Aurora’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 18,350 people · Water system ID IL0890600 · 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 |
|---|---|---|---|---|
| Fluoridehighest measured · range 1.06 to 1.06 · 2024 report, page 6 | 1.06 ppm | 1 ppm | 4 ppm | Above the health goal1.1x the health goal |
| Radium (combined 226 + 228)highest measured · range 0.9 to 4.53 · 2024 report, page 6 | 4.53 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.07 to 0.09 · 2024 report, page 6 | 0.09 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 0.1 to 0.1 · 2024 report, page 6 | 0.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2024 report, page 6 | 0.15 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 2.11 · sampled 2019 · 2024 report, page 6 | 2 ppb | None set | 60 ppb | Below the legal limit |
| Lithiumsingle sample · 2024 report, page 6 | 32.6 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 North Aurora’s water between Aug 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium34.6 ppbFound in 4 of 4 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.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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