We read 10 results from La Grange’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 16,200 people · Water system ID IL0311530 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 · sampled 2020 · Chicago source water · 2025 report, page 5 | 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 · 2025 report, page 5 | 6.5 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal33x the health goal |
| Radium (combined 226 + 228)highest measured · range 0.83 to 0.95 · sampled 2020 · Chicago source water · 2025 report, page 5 | 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 · Chicago source water · 2025 report, page 4 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 1 to 1.5 · 2025 report, page 4 | 1.3 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · printed as 125 ppb · 2025 report, page 5 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 12.5 to 25 · 2025 report, page 4 | 20 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 16.7 to 60 · 2025 report, page 4 | 46 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.68 to 0.71 · Chicago source water · 2025 report, page 4 | 0.7 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.32 to 0.36 · Chicago source water · 2025 report, page 4 | 0.36 ppm | 10 ppm | 10 ppm | Below the health goal |
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.
More districts: Illinois water quality · All states · Something look wrong? Tell us