Frequently Asked Questions
1. Where does our water come from?
The DuPage Water Commission's water comes from Lake Michigan, the largest freshwater lake in the United States and the fifth largest lake in the world. The Commission purchases the water from the Chicago Water Department. Chicago's Jardine Water Purification Plant treats the water that the Commission purchases. The Jardine Water Purification Plant is the largest potable water filtration plant in the world with a capacity of 1.4 billion gallons per day.