Edina Water Hardness & Quality Report (2026)

City of Edina Public Works Department Utility Division operates the water system serving most of Edina, Minnesota, in Hennepin County, with a separate Morningside system sourced from the City of Minneapolis. Edina's primary supply comes from 18 groundwater wells at depths of 381 to 1,150 feet. All well water undergoes treatment including fluoride addition for dental health, chlorine disinfection, and polyphosphates to inhibit pipe corrosion. A small portion of Morningside receives treated surface water from Minneapolis.

Edina's groundwater originates from deep wells in the glacial and bedrock aquifers of the Twin Cities metropolitan area, influenced by the broader Upper Mississippi River watershed. The local geology features Quaternary glacial till and outwash overlying Paleozoic bedrock, including dolomite and limestone formations from the Ordovician period, particularly the Prairie du Chien Group. These carbonate-rich layers impart a hard character to the water through mineral dissolution, resulting in naturally mineralized groundwater that requires management for household use.

Very hard water in Edina promotes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan while increasing energy costs. Coffee makers and faucets show visible deposits, and soap lathering is poor. The utility recommends water softeners set to 3–4 grains for optimal performance, with high-efficiency models advised to minimize salt and water use. Regular maintenance includes descaling heaters annually and inspecting softeners monthly. Historical detections include low levels of arsenic (1.21–3.46 ppb) and barium; the city meets lead and copper rules via corrosion inhibitors.