We read 13 results from Aurora’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 183,000 people · Water system ID IL0894070 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 3.46 to 3.89 · listed as a violation in the report · sampled 2023 · Entry point · 2025 report, page 3 | 3.89 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.007 to 0.007 · listed as a violation in the report · Entry point · 2025 report, page 3 | 0.007 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloramineaverage · range 3 to 3 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 3 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · listed as a violation in the report · Entry point · 2025 report, page 3 | 3 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 7.2 to 24.5 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 19 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 33.2 to 78.8 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 55 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · listed as a violation in the report · Entry point · 2025 report, page 3 | 0.6 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · listed as a violation in the report · Entry point · 2025 report, page 3 | 1 ppm | 10 ppm | 10 ppm | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Treatment plant · 2025 report, page 3 | 0.06 NTU | None set | 1 NTU | Below the legal limit |
| PFHxA (a PFAS)highest measured · Entry point · 2025 report, page 4 | 3.4 ppt | None set | None | No health limit |
| PFPeA (a PFAS)highest measured · Entry point · 2025 report, page 4 | 3.5 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 57 to 57 · Entry point · 2025 report, page 3 | 57 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. 4 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Aurora’s water between May 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS3.7 pptFound in 2 of 4 samples · highest resultNo federal limit in force for this one
- Lithium18.6 ppbFound in 3 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.
Radium and uranium
Found: Gross alpha (radioactivity)
What removes it: Reverse osmosis.
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