made in mandan

Water Treatment

The City of Mandan owns and operates a water treatment plant capable of producing 12 million gallons per day (MGD) in accordance with the United States Environmental Protection Agency (EPA) and North Dakota Department of Health regulations. On average, the plant treats about 2.8 million gallons of water per day, with a peak summer demand of around 7 million gallons.  

There are three water reservoirs in the system: a 2-million gallon reservoir, a 3-million gallon reservoir, and a 4-million gallon compartmentalized reservoir with a 1.5 million gallon section and a 2.5 million gallon section.

The water reservoirs provide storage for fire protection and peak demand periods. 

Byproducts of the water treatment process, primarily lime sludge, are hauled to the city landfill where they are used for daily cover.

The regulation of drinking water by the federal government began with the 1976 Safe Drinking Water Act. The EPA has added new and more stringent regulations almost every year since. The drinking water industry is the most heavily regulated industry in the country.


Chemical Analysis - Click here to view the Water Analysis from Oct. 2021.

Cloudy Water

Conserving Water


Lead in Drinking Water

Treatment Process

Water Quality Reports


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