Fergus Falls Water Hardness & Quality Report (2026)

The Fergus Falls Water Utility supplies clean drinking water to 14,194 residents in Fergus Falls, Minnesota. This municipal utility draws from surface water sources within the North Central Hardwood Forests ecoregion. Water is treated at a surface water treatment plant located in the city, employing conventional filtration and softening techniques. Chloramines are used as the primary disinfectant to ensure the water's safety. The utility's operations are a vital part of the community's infrastructure, providing a consistent and reliable water supply.

The Fergus Falls water supply originates in an area shaped by extensive glacial activity during the Pleistocene epoch. These glacial deposits, primarily till rich in carbonate minerals, lie atop older Precambrian crystalline bedrock. This geological makeup is the reason for the water's hardness, as the glacial materials readily dissolve minerals like calcium and magnesium into the water. The region's history of glaciation has naturally enriched both surface and groundwater with these dissolved solids, creating a supply that requires specific treatment.

Homeowners in Fergus Falls often notice mineral buildup, commonly known as scale, in their pipes, appliances, and fixtures due to the water's hardness. Devices like water heaters, dishwashers, and washing machines are particularly prone to this issue, which can shorten their lifespan. Many residents find that installing a water softening system, either whole-house or point-of-use, helps reduce scale and improve the lathering of soaps and detergents. Fortunately, the Fergus Falls Water Utility already incorporates softening into its municipal treatment process, and the water consistently meets all federal health standards, with contaminant levels well below EPA action limits. Residents can request an annual Consumer Confidence Report by calling 218-332-5435.