Combine 2 1/2 cups water and salt in a small saucepan. Bring to a boil, stirring constantly, until salt is dissolved, about 3 minutes.
Pour water and salt mixture into a 5-gallon bucket. Add 1 gallon of water.
Combine 2 1/2 cups water and brown sugar in a small saucepan. Bring to a boil, stirring constantly, until sugar is dissolved, about 3 minutes. Pour into the bucket.
Stir apple juice, whiskey, and lemon juice into the bucket. Add chopped apple. Squeeze in orange juice and add in rinds.
