The answer to 'water softener rusty water' is that rusty water from a water softener is often caused by corrosion within the softener unit itself. This can happen over time as the internal components, like the brine tank or resin beads, start to break down. Symptoms include reddish-brown or orange-colored water coming from faucets and fixtures.
The solution may be as simple as cleaning or replacing the water softener's internal components, or in some cases, the entire unit may need to be replaced. It's important to address this issue promptly, as rusty water can stain laundry, damage appliances, and even pose health risks if the water is consumed.