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The City of Lakeville provides water to its residents from a groundwater source: 18 wells ranging from 460 to 864 feet deep. The wells draw water from the Prairie DuChien-Jordan and the Tunnel City-Wonewoc aquifers. Lakeville has six water towers and one ground storage tank that store a total of 11.85 million gallons of water. The Lakeville Water Treatment Facility was built in 1998 and expanded in 2001 and 2005 to serve the needs of residents and meet the demands of the City's significant development. The City complies with rigorous state and federal standards to ensure that the water delivered to residents is both safe and good tasting. The primary water treatment processes, using chlorine and potassium permanganate, are expressly designed to oxidize and remove iron and manganese. Fluoride is added in accordance with the Minnesota Department of Health criteria to promote dental health. The hardness of water for the City of Lakeville is 18 grains per gallon. When setting up a water softener we suggest you set the grain amount at 16 grains per gallon. If water is over-softened, it may become corrosive. If you have questions on water treatment or quality, call 952-985-2700. Tours of the Water Treatment Facility are available for your group or class. If you are interested, call 952-985-2700 to schedule a tour.