We read 13 results from Glen Ellyn’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 28,850 people · Water system ID IL0430450 · 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 2.8 to 3.1 · listed as a violation in the report · sampled 2020 · Chicago source · 2025 report, page 8 | 3.1 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 9 | 2.75 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal14x the health goal |
| Radium (combined 226 + 228)highest measured · range 0.83 to 0.95 · listed as a violation in the report · sampled 2020 · Chicago source · 2025 report, page 8 | 0.95 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.02 to 0.02 · listed as a violation in the report · Chicago source · 2025 report, page 8 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 1 to 1.2 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 1.1 ppm | None set | 4 ppm | 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 9 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 10.7 to 24 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 19 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 20.3 to 59 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 40 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.67 to 0.75 · listed as a violation in the report · Chicago source · 2025 report, page 8 | 0.75 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.32 to 0.36 · listed as a violation in the report · Chicago source · 2025 report, page 8 | 0.36 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfatehighest measured · range 26.8 to 27.2 · listed as a violation in the report · Chicago source · 2025 report, page 8 | 27.2 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Chicago treatment plants · 2025 report, page 8 | 0.29 NTU | None set | 1 NTU | Below the legal limit |
| Sodiumhighest measured · range 8.67 to 9.1 · listed as a violation in the report · Chicago source · 2025 report, page 8 | 9.1 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.
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), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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