Grayslake drinking water comes from a mix of groundwater and surface water sources. Based on the most recent monitoring data, 5 contaminants have been detected in the water supply, including Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), and 1 others. PFAS testing has been conducted with no detections. Water hardness is 190 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.
Contaminants detected in Grayslake water
5 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Grayslake tap water meets EPA legal standards (Maximum Contaminant Levels). However, 3 contaminants are present above independent health guidelines, which are often stricter than legal limits. 5 contaminants have been detected in the water supply, including Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Orthophosphate. View the detailed report for each water system to see specific levels and how they compare to both legal limits and health guidelines.
What contaminants are in Grayslake water?
Monitoring has detected 5 contaminants in Grayslake's water supply: Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Orthophosphate. 3 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Grayslake water have PFAS?
Grayslake'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.
Is Grayslake water hard?
Yes. Grayslake water has a hardness of 190 mg/L (very hard). Hard water is not a health concern but can cause scale buildup in water heaters and appliances, reduce soap effectiveness, and leave mineral deposits. Water softeners or conditioning systems can address hardness.
Where does Grayslake get its drinking water?
Grayslake's drinking water comes from a combination of groundwater and surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Grayslake is served by 3 water systems, the largest being GRAYSLAKE (serving 21,248 people).
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