McHenry County · 5,820 residents · 2 water systems
9
Contaminants detected
0
PFAS compounds
—
Hardness (mg/L)
1
Above legal limits
2
Above health guidelines
Wonder Lake drinking water comes from groundwater wells. Based on the most recent monitoring data, 9 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, and 5 others. PFAS testing has been conducted with no detections.
Contaminants detected in Wonder Lake water
9 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Wonder Lake tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 2 above independent health guidelines. 9 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Radium, Total Trihalomethanes. View the detailed report for each water system to see specific levels, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Wonder Lake water?
Monitoring has detected 9 contaminants in Wonder Lake's water supply: Lead, Arsenic, Copper, Radium, Total Trihalomethanes, Haloacetic Acids (HAA5), Benzo(a)pyrene, Barium, Mercury (inorganic). 1 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Wonder Lake water have PFAS?
Wonder Lake's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Where does Wonder Lake get its drinking water?
Wonder Lake's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Wonder Lake is served by 2 water systems, the largest being WONDER LAKE (serving 3,870 people).
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