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Madison Water Utility takes water quality very seriously. Drinking water in the Madison area emanates from an aquifer of deep sandstone that lies below the city. Groundwater that originates from rain or snow seeps into the ground where it is naturally filtered as it flows through layers of rock and soil before replenishing the aquifer. The water system consists of 30 reservoirs, including 5 elevated water towers, and 22 active wells with approximately 840 miles of interconnected water distribution and transmission mains. Water is delivered to localized regions of Madison from 500 – 1100 feet deep wells.

Madison Water Utility routinely collects samples and runs tests in excess of the requirements by the DNR and the EPA to make sure that the drinking water is of a quality that exceeds all state and federal standards required. It is easy to find out what the water quality is like in your home by contacting the Water Quality Department, or when you have any concerns regarding the quality of your drinking water in the Madison, Wisconsin area. We have a Minnesota custom home builder that is looking to set up another office here, and they asked us about the quality of water. After Flint, it’s a concern that more people have that are planning their futures.

The aquifer system that supplies drinking water to Madison residents is of a higher quality than most other cities and requires minimum treatment. The water from the aquifer is disinfected with chlorine to kill most bacteria and viruses that occur in groundwater. This chlorine treatment also kills microbes that may be present in the water transmission system. The Madison Water Utility goal is to maintain the chlorine residual above 0.1mg/L while typical concentrations in other cities range anything from 0.2 – 0.4mg/L. the water at every well in the Madison area is tested daily to ensure that chlorine levels remain as close as possible to the required 0.3mg/L.

The Wisconsin Department of Health Services and the US Centers for Disease Control and Prevention recommend an average fluoride level of 0.7mg/L be maintained in drinking water to reduce tooth decay and improve dental health. Madison drinking water is tested daily to maintain this target level. MWU follows the PHMDC (Public Health Madison Dane County) recommendations with regard to fluoride levels in drinking water.