Stoughton Water Hardness & Quality Report (2026)

Stoughton Utilities pumps groundwater from four municipal wells located throughout Stoughton, Wisconsin. These wells draw directly from the regional Cambro-Ordovician aquifer system, supplying Stoughton's approximately 13,000 residents. The Stoughton Waterworks doesn't utilize any surface water sources; instead, the groundwater is sent to three storage facilities before entering the distribution system. Treatment is minimal, involving only disinfection with hypochlorite. The utility can be reached at PO Box 383, Stoughton, WI 53589, or by phone at (608) 873-3379.

The water originates from the Cambro-Ordovician aquifer system, a vast underground reservoir beneath southern Wisconsin's Dane County. This aquifer is primarily composed of Cambrian sandstones, including the Jordan and Mount Simon formations, overlaid by Ordovician dolomites from the Prairie du Chien Group. Groundwater percolates through these sedimentary rocks, which are rich in calcium and magnesium carbonates. Dissolution of these minerals within the limestone and dolomite fissures, a process influenced by the region's karst geology, naturally makes the water very hard.

This very hard water, with a hardness level of 308.16 mg/L, can lead to significant limescale buildup in household plumbing, water heaters, and appliances like dishwashers and coffee makers. Such buildup can reduce appliance lifespan by 30-50%. You'll also notice reduced soap efficiency, leaving residue on dishes, skin, and hair, along with spotting on fixtures. Regular descaling of appliances with vinegar and biannual flushing of hot water tanks can help mitigate these issues. For Stoughton residents, installing a water softener is highly recommended to prevent scale, prolong the life of your appliances, and improve cleaning effectiveness.