The answer to 'why is my garbage disposal rusty water' is that a rusty garbage disposal is usually caused by corrosion inside the unit. Over time, the metal components can start to rust, leading to discolored water coming from the disposal. This is a common issue, especially with older or lower-quality disposals.
Some common causes of a rusty garbage disposal include exposure to acidic foods, improper maintenance, and general wear and tear. Symptoms may include a reddish-brown tint to the water, a metallic taste or smell, and reduced performance of the disposal. To fix the issue, you may need to replace the disposal or have a plumber clean or repair the internal components.