Preheat the oven to 400 degrees F. Grease and flour 12 muffin cups or use paper liners.
In a bowl, mix sugar, oil and eggs. Add pumpkin and water. In a separate bowl, mix together the flour, baking soda, baking powder, spices and salt. Add wet mixture and stir in chocolate chips.
Fill muffin cups ⅔ full with batter. Bake in preheated oven for 20 to 25 minutes. Let cool in pan on rack for 5 minutes. Transfer to rack; let cool.