Recreational Vehicles and Boats . The proper management of these wastes and materials can reduce the potential impacts of these vehicles. In many cases, sewage pump-out stations should be constructed to manage sewage from boats and RVs and ensure that the environment is not contaminated. Horses and other pack animals, which are commonly found at recreation areas, can affect the environment as a result of their manure. Manure from animal trails and stables can enter nearby waterways via runoff and lead to nutrient loading and algal and aquatic plant blooms.
Manure can also cause nuisance problems, such as odors and pests.
Other References U.S. EPA, Office of Enforcement and Compliance Assurance. Tourism - Technical Support Document, International Training Workshop Principles of Environmental Enforcement.