West Saint Paul Water Hardness & Quality Report (2026)

West Saint Paul, Minnesota, in Dakota County — a Dakota County first-ring suburb adjacent to Saint Paul, a fully developed inner suburb in the south Saint Paul metropolitan area — receives its municipal water from the City of West Saint Paul Water Department or through purchase from Saint Paul Regional Water Services (SPRWS), drawing from the Mississippi River at the Gorge Water Treatment Plant serving the Saint Paul metro area.

The moderately hard 146.5 mg/L hardness and TDS of 278.4 mg/L reflect the Saint Paul area Mississippi River supply's Dakota County character. The Mississippi River at Saint Paul drains the Minnesota Drift Plains (calcareous Pleistocene glacial till) and the Saint Croix and Rum River tributaries (mixed soft-hard drainage from the eastern Minnesota drift terrain). Saint Paul Regional Water Services treats the Mississippi River supply, and the West Saint Paul distribution area draws from the same Mississippi River supply with the moderate hardness characteristic of the south Saint Paul metro zone.

At 146.5 mg/L, West Saint Paul's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 4.5 ppt warrants a certified drinking water filter — 3M's Minnesota PFAS legacy (Cottage Grove Washington County — upstream Mississippi River), the Fort Snelling (Minneapolis-Saint Paul National Cemetery — AFFF legacy), and the Twin Cities industrial PFAS complex contribute to West Saint Paul's readings.