1. Preheat oven to 250 degrees F.
2. Mix sugar, cinnamon, and salt together in a bowl.
3. Whisk egg white and water together in a separate bowl until frothy. Toss pecans in the egg white mixture. Mix sugar mixture into pecan mixture until pecans are evenly coated. Spread coated pecans onto a baking sheet.
4. Bake in the preheated oven, stirring every 15 minutes, until pecans are evenly browned for about 1 hour.