Place the chicken into a bowl and sprinkle on the salt and spices. Use your hand to coat the chicken breasts in the seasoning.
Layer the chicken breasts in the bottom of your slow cooker in a single layer - avoid overlapping as much as possible. Pour in the water. (The water should almost cover the breasts, use more as needed.)
Cover the slow cooker and cook on HIGH for 2 hours (LOW for 5 hours) or until the chicken reaches an internal temperature of 160 degrees F.
Take the chicken out of the slow cooker and let it rest on a cutting board for 5-10 minutes. The internal temperature will continue to rise to 165 degrees F while resting. Serve warm, sliced, shredded, or as whole breasts.
Notes
If preferred, you can use 1/2 cup of butter or 1 cup of low-sodium chicken broth instead of water for some extra flavor. Using these options will change the nutritional information.