McHenry County · 1,298 residents · 2 water systems
4
Contaminants detected
0
PFAS compounds
420
Hardness (mg/L)
0
Above legal limits
1
Above health guidelines
Johnsburg drinking water comes from groundwater wells. Based on the most recent monitoring data, 4 contaminants have been detected in the water supply, including Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). Water hardness is 420 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.
Contaminants detected in Johnsburg water
4 total
Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.
Johnsburg tap water meets EPA legal standards (Maximum Contaminant Levels). However, 1 contaminant is present above independent health guidelines, which are often stricter than legal limits. 4 contaminants have been detected in the water supply, including Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). 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 Johnsburg water?
Monitoring has detected 4 contaminants in Johnsburg's water supply: Lead, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Is Johnsburg water hard?
Yes. Johnsburg water has a hardness of 420 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 Johnsburg get its drinking water?
Johnsburg'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. Johnsburg is served by 2 water systems, the largest being JOHNSBURG NO.2 (serving 1,124 people).
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