Preheat oven to 275 F and prepare a sheet pan with parchment or a silicon baking mat.
In a medium bowl, whisk together sugar, cinnamon and salt.
In a large bowl, whisk together egg white, vanilla extract and water until frothy. Toss in pecans and mix until coated. Add in the sugar mixture and mix again until the pecans are evenly coated.
Spread the pecans onto the baking sheet. Bake for 50-60 minutes, stirring every 15 minutes.