Moorhead Water Hardness & Quality Report (2026)

Moorhead Public Service provides drinking water to approximately 44,000 residents in Moorhead, Minnesota, in Clay County along the North Dakota border. The supply is mixed, historically drawing approximately 60% from the Red River and the remainder from groundwater wells. Treatment occurs at facilities managed by the Moorhead Public Service Department, applying filtration, disinfection, and continuous monitoring to ensure compliance with EPA drinking water standards. Annual Consumer Confidence Reports are published detailing system performance and contaminant levels throughout the service area.

The Red River watershed forms the primary surface water source; Cretaceous bedrock formations near the river contribute salinity and elevated dissolved solids. Groundwater is sourced from local aquifers in the Red River Valley influenced by ancient glacial deposits and limestone bedrock, which load the supply with dissolved calcium and magnesium through rock dissolution and glacial till interaction. This geology imparts a very hard character to the combined supply, alongside potential taste and odor issues from river sources.

Very hard water promotes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Showers leave soap scum, and laundry requires extra detergent. Regular deliming of appliances, installing drain screens, and flushing systems are strongly advised. A water softener is strongly recommended for all households to protect plumbing. Notable contaminants above health guidelines include arsenic, hexavalent chromium, and disinfection byproducts, though legal limits are met; treatment involves source blending to manage river-related taste and odor and address geological minerals.