The answer to 'why is my garbage disposal rusty water' is that a rusty garbage disposal is typically caused by corrosion inside the unit. Over time, the metal components can start to deteriorate, leading to discolored or rusty water coming from the disposal. This is a common issue, especially with older or lower-quality disposals.
The rusty water may be accompanied by other symptoms like slow draining, strange noises, or a foul odor. In some cases, the rust can even clog the disposal or cause it to stop working entirely.