- Love's Travel Stop is a convenient location for dumping black and gray water, as well as filling up fresh water.- Marion County Park also provides RV dump services with a hose for flushing tanks, a trash bin, and waste disposal facilities.- Thomas Mitchell Park offers an RV dump station for visitors to Monroe, Iowa and includes all necessary amenities.- Ames Water Pollution Control Facility is another option for those in the area looking to dispose of waste and refill freshwater tanks.