Preheat the oven to 250 degrees F (120 degrees C).

Beat egg white with water in a large bowl until frothy. Stir in pecans and mix to coat. Combine sugar, cinnamon, and salt in a small bowl; stir into pecan mixture. Spread pecans on a baking sheet.

Bake, stirring every 15 minutes, in the preheated oven for 1 hour. Store in an airtight container.