Preheat oven to 350°F degrees. Line a 9" x 5" loaf pan with parchment paper; set aside.
Make the loaf batter
In a large bowl, whisk together the dry ingredients (flour, both sugars, baking soda, baking powder, cinnamon, nutmeg) until well blended.
Adding one at a time, whisk in the the pumpkin puree, eggs, vegetable oil, water, and vanilla to the dry mix, stirring in between each new ingredient.
Fold in the 1/2 cup chocolate chips last, until well blended.
Pour evenly into the prepared loaf pan.
Sprinkle remaining chocolate chips over the top of the loaf.
Bake at 350°F degrees for 50-60 minutes, or until a toothpick inserted into the center of the loaf comes out clean without any wet batter.
Notes
Makes approximately 8-10 servings. Storage: Store in an airtight container at room temperature for up to 5 days, or in the refrigerator for up to one week. Freeze: You can store in a freezer-safe container or freezer bag for up to two months. Thaw in the refrigerator overnight before serving.