Wonder Lake’s official 2025 reports cover separate East and West public water systems, both identified as groundwater systems. Windy City Water Pros can discuss whole-home water-treatment options for your home, goals, plumbing, and available space. A utility report describes the public system. It is not a reading from one home's tap, where plumbing, fixtures, sample location, and existing treatment can change the experience.
Groundwater; the Village’s current reports identify both the WONDER LAKE (NIU/East) and WONDER LAKE (West) public water systems as groundwater systems.
The Village’s official Consumer Confidence Report page posts separate 2025 Water Quality Reports for Wonder Lake East and Wonder Lake West; each covers January 1 through December 31, 2025.
Both 2025 reports identify their respective public water systems as groundwater. The East report lists Wells #10 and #11; the West report lists Wells #4, #5, and #9.
This report does not publish a hardness figure. Ask us to test your water instead of using a guessed number.
These official reports describe separate public water systems and system-level sampling or notices. They do not establish water conditions, plumbing materials, hardness, contaminants, compliance, or treatment needs at an individual Wonder Lake home.
The 2020-2024 ACS estimate puts the median year built for Wonder Lake housing units at 1970, a late twentieth-century housing era. That is context for discussing plumbing access, fixture age, and updates at a specific address, not a condition report for any one home.
The Village’s current 2025 reports identify the East and West public water systems as groundwater systems. The reports list Wells #10 and #11 for East and Wells #4, #5, and #9 for West.
Why are there separate Wonder Lake water reports?
The Village posts separate 2025 reports for the East and West public water systems. Confirm the system serving your property with the Village before relying on a particular report.
What does the latest West report say about Lead and Copper Rule notices?
The 2025 West report includes notices for a monitoring/reporting requirement and delayed consumer notice during specified 2025 periods. The report says the semiannual sampling was completed and registered with the State, and that a follow-up resample passed.
Does a municipal water report tell me what is happening at my faucet?
No. The reports describe public-system information and reported sampling or notices. They do not determine conditions, plumbing materials, or treatment needs at an individual home.