We read 5 results from Glendale Heights’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 34,208 people · Water system ID IL0430400 · 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 |
|---|---|---|---|---|
| PFOS (a PFAS)single sample · printed as .0023 ug/L · sampled 2024 · Distribution system · 2025 report, page 9 | 2.3 ppt | 1 ppt | 4 ppt from 2029 | Above the health goal2.3x the health goal |
| Chlorinehighest measured · range 0.7 to 1 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 12.6 to 22 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 20 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 20 to 51 · listed as a violation in the report · Distribution system · 2025 report, page 9 | 41 ppb | None set | 80 ppb | Below the legal limit |
| Lithiumsingle sample · sampled 2024 · Distribution system · 2025 report, page 9 | 5.37 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.
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.
PFAS ("forever chemicals")
Found: PFOS (a PFAS)
What removes it: Reverse osmosis.
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