Preheat the oven to 500 degrees F (260 degrees C). In a small saucepan over medium heat, stir together the water, ketchup, brown sugar, vinegar, lemon juice, and Worcestershire sauce. Season with salt, mustard powder, and chili powder. Simmer the sauce for 15 minutes.
3 tablespoons ketchup, 3 tablespoons brown sugar, 2 tablespoons vinegar, 1 tablespoon lemon juice, 2 tablespoons Worcestershire sauce, 1 teaspoon salt, 1 teaspoon dry mustard, 1 teaspoon chili powder, 4 tablespoons water