Edina Water Hardness & Quality Report (2026)

Edina, Minnesota, in Hennepin County south of Minneapolis — one of Minnesota's most affluent suburbs, known as the 'Cake Eaters' suburb (a local rival nickname), home of Southdale Center (the world's first fully enclosed shopping mall, opened 1956), and a premier Twin Cities suburban community with excellent schools — draws its municipal water supply from the Prairie du Chien–Jordan Aquifer via the City of Edina Utilities Water Division. Water hardness in Edina measures 245 mg/L — classified as very hard.

Edina's very hard supply reflects the Hennepin County calcareous Paleozoic aquifer — among the hardest Twin Cities suburban supplies. The Prairie du Chien Dolomite (Ordovician Oneota and New Richmond Formations — highly calcareous dolomite of the Minneapolis Paleozoic aquifer stack) in the Edina zone is pumped at shallow to moderate depths where the dolomite is freshest and most calcareous, contributing very high dissolved calcium and magnesium. The deeper Cambrian Mt. Simon Sandstone provides additional calcareous contribution from the calcareous cement. Edina's Prairie du Chien dolomite pumping zone produces the very hard 245 mg/L — among the hardest in the Twin Cities south suburban corridor.

At 245 mg/L, Edina residents face significant hard water challenges. Scale deposits form rapidly on all fixtures and tile — monthly descaling with citric acid solution is essential maintenance. City of Edina Utilities Water Division consistently delivers water meeting all Minnesota MDH and EPA Safe Drinking Water Act requirements.