When in Coggon, Iowa, you have a few options for dumping your RV rental's waste:Rest Stop I-80 EB Tiffin offers a convenient dump station with easy access from the highway.West Liberty RV Park is another nearby option, providing facilities for black water and gray water disposal, as well as fresh water and a hose for flushing tanks.If you're looking to stay closer to the city, the Water Pollution Control Plant in Coggon also offers a dump station.R Campground is another choice in the area that provides RV waste disposal services along with an RV trash bin.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.