Watertown sits along the Crow River, where groundwater moves through mineral-rich glacial layers. Most wells in this area show hard water with traces of iron and fine sediment that coat fixtures and reduce water heater life. Over time, that buildup makes appliances work harder and increases energy use.
At Peterson Salt Company, we have served the city’s homes and businesses since 1987 as a licensed, family-owned water treatment provider. Our technicians help residents solve hard-water problems, deliver high-quality salt, and install systems that keep water clear and plumbing protected.

