1In small bowl, stir together salt, paprika, garlic powder and brown sugar.
2Spray 4- to 6-quart slow cooker with cooking spray. Rinse pork roast under cool water. Rub salt mixture on pork to cover completely. Place pork in slow cooker. Add water to side of pork.
3Cover; cook on High heat setting 5 to 6 hours.
4In slow cooker, use 2 forks to shred pork. Stir in barbecue sauce until well mixed.