Mastic, New York offers a couple of convenient dump stations for RV travelers in need of dumping their black water and gray water tanks. You can find dump stations at Blydenburgh Park and Hammonasset Beach State Park. These dump stations provide fresh water for flushing tanks and also have an RV trash bin for easy disposal of waste. If you're looking for additional options, Eastern Long Island Kampground is another nearby campground with a dump station available. Some locations listed in this article are the nearest of their kind to the starting point, and the actual drivable distance could exceed 200 miles.