There are a few and I suggest you look at Webmd for a complete list. Here is on thing I read there from Webmd;
Orange urine may result from:
Medical conditions. In some cases, orange urine can indicate a problem with your liver or bile duct, especially if you also have light-colored stools. Orange urine may also be caused by dehydration, which can concentrate your urine and make it much deeper in color.
