The answer to 'why is my garbage disposal leaking water' is that there are a few common causes, including a worn or damaged seal, a loose mounting, or a crack in the disposal unit itself. Leaks can occur at the connection between the disposal and the sink, around the drain, or even from the disposal motor housing.
Some common symptoms of a leaking garbage disposal include water pooling under the sink, dripping from the disposal, or a musty odor coming from the drain. To fix the leak, you'll need to identify the source and make the necessary repairs. This may involve replacing the seal, tightening the mounting, or replacing the entire disposal unit if it's beyond repair.