Red Wing Water Hardness & Quality Report (2026)

Red Wing Public Utilities serves approximately 16,500 residents in Red Wing, Minnesota, a Mississippi River community in Goodhue County. The primary source is the Mississippi River, supplemented by local groundwater wells. Water is treated at facilities managed by the utility, with quality monitored through the City Laboratory, a Minnesota State Certified Lab providing analytical services to the community and reachable at 651.385.5143. The service area covers the city and surrounding regions along the river.

The Mississippi River watershed at Red Wing drains a vast upper Midwest basin, with local influences from the Cannon River sub-watershed. Underlying geology features Ordovician and Devonian carbonate rock formations including the Platteville Limestone, Shakopee Formation, and Galena Dolomite, which form karst aquifers. These limestone and dolomite layers dissolve over time, releasing minerals that result in a very hard supply with elevated total dissolved solids reflective of the mineral-rich bedrock.

At very hard levels, scale buildup is severe, accelerating damage to water heaters, dishwashers, washing machines, and plumbing fixtures, with annual repair costs potentially reaching thousands of dollars. Spotting on glassware, drier skin and hair, and reduced soap efficiency are common. Regular descaling of appliances, installing sediment filters, and flushing water heaters are necessary; a whole-house water softener is strongly recommended. Recent testing detected 11 contaminants, with five exceeding health guidelines: total trihalomethanes (TTHMs), bromoform, dibromochloromethane, nitrate, and combined radium; overall grade B.