We read 7 results from Vernon Hills - Lake Co Pw’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 33,207 people · Water system ID IL0971750 · 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 |
|---|---|---|---|---|
| PFOA (a PFAS)highest measured · range 1.9 to 2.5 · CLCJAWA (supplier) · 2025 report, page 5 | 2.5 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal357x the health goal |
| PFOS (a PFAS)highest measured · range ND to 2.4 · CLCJAWA (supplier) · 2025 report, page 5 | 2.4 ppt | 1 ppt | 4 ppt from 2029 | Above the health goal2.4x the health goal |
| Chlorinehighest measured · range 0.9 to 1 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 4 | 0.15 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 3.2 to 8 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 6.93 to 32.7 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 23 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 4 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
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: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
More districts: Illinois water quality · All states · Something look wrong? Tell us